"Older than a Boomer" editionOld thread: >>2371723Eternal thread theme: https://www.youtube.com/watch?v=mf_P0BXrYTo>New to /ham/? Read this shit!http://www.arrl.org/what-is-ham-radiohttps://www.fcc.gov/wireless/bureau-divisions/mobility-division/amateur-radio-service>Your search engine of choice works well too!The FAQ is now back:https://wiki.cybsec.io/index.php/HamFAQ>NEW FAQ is updated to preview 13https://files.catbox.moe/3xr6gh.htm>The wiki is down but is archived: https://archive.is/PjR5s>Idiot's Guide to Coax Cablehttps://www.pcs-electronics.com/guide_coax.php>Looking for frequencies to monitor near you?http://www.radioreference.com>Basic Rx loop fundamentalshttps://www.w8ji.com/magnetic_receiving_loops.htm>DIY SWL Mag. Loophttp://www.kr1st.com/swlloop.htm>Small Tx Loophttp://webclass.org/k5ijb/antennas/Small-magnetic-loops.htm>In Depth Loop articleshttp://www.kk5jy.net/magloop/>Homebrew RF Circuitshttps://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/Homebrew_RF_Circuit_Design_Ideas.htm>NEW Libraryhttps://mega.nz/file/UCgEGAjb#rwNcnMAQCUUbSp8supsFvn9QEHCWUW86eLcZa16ZG4Y>Online Practice Tests:http://aa9pw.com/https://hamstudy.org/https://hamexam.org/> Real-Time Propagation Datahttp://prop.kc2g.com/>Space Weatherhttps://www.swpc.noaa.gov/communities/radio-communications>WSJT-X 2.1 User Guidehttps://physics.princeton.edu/pulsar/k1jt/wsjtx-doc/wsjtx-main-2.1.2.html>Homosexual (ft8) guidehttps://www.g4ifb.com/FT8_Hinson_tips_for_HF_DXers.pdf>APRShttp://www.aprs.org/>how do I into Morse code in a good way?https://pastebin.com/XwATbRrH
>>2387557Breaker 1 9 this here's the red rooster! come on?
>>2387562>dat colostomy bagGets me everytime thinking it really is one at first glance.
Got a $25 phase noise canceller. Hopefully it does something. Lame how it lacks all the solder holes to hook it up but its cheap and I think a chinese clone of a $200 one. https://www.amazon.com/gp/aw/d/B08P1JL4ZH
Are there any multi-band CB antennas? Something like 11m/2m/70cm? I'd like 1.25m as well but can do without that band
>>2387629>multi-band CBwhat the fuck
>>2387641I don't want a bunch of antennas hanging off my car.
>>2387593Is it that bad ? Did you identified the origin of the QRM ?I have two sources : ethernet and the UPSfor the ethernet I am going to try the filters from DX Engineering (60 euros for 2 pieces) and for the UPS I found some RFI filters with the right power rating, next solution is go full wifi and get rid of the UPS
>>2387642but you will need a HF/2m-70cm diplexer, I don't know if that exists ?There is the Komunica 10m / 6m / 2m / 70cm antennahttps://komunicapower.com/en/hf/805-komunica-pwr4cross-mobile-antenna-4-bands-10m6m2m70cm.html
>>2387642>>2387648and then the diplexer Diamond :MX-62M if 6m is on the HF transceiverMX-610 if 6m is on the VHF/UHF transceiver
>r9k blog sprinkled with bait and retarded questions generalall replies are quora-esque pajeet tier by people who've never touched a wire in their life, let alone a radio.
>>2387562I am going vertical for now
>>2387629Diamond D130J - plus it looks really good on your car roof.
>>2387672That'd look ridiculous
>>2387682But it does 25MHz up to VHF/UHF
>>2387684I'd rather have multiple antennas than that monstrosity on my sports car
>>2387693Someone sounds jealous
>>2387641I can see a CB / FRS combo handy being worth a shot
>>2387694>jealousPost specs, big boy.
>>2387695Exactly. I've got a CB, FRS/GMRS/Weatherband, and a 2m/1.25/70cm radio in there.
>>2387643Yeah it's like S9. A block away with a handheld is far better. Bathroom fan from neighbor is one cause but the entire apartment complex seems to radiate just fuzz noise since there weren't any other obvious hotspots with the handheld, I'm guessing from underground power wires or people growing weed. A few feet off the complex it starts tapering down.
What's a good frequency for coming through on somebody's stereo audio equipment?
>>2387722Somebody in the neighborhood is bleeding on HF to aviation VHF.An annoying buzz sound.I suspect it's some guy with audiophile equipment.
>>2387562nice Sony tv remote in the bottom pic. Have the same one for my autism tube.
Good god, can you hams stop being such obese soiboys?
>>2387871High-power UHF/microwaves AM modulated with the audio you wish to impose into the stereo...
CB bleeds on Karaoke systems pretty well.https://www.youtube.com/watch?v=5F6JwFmYLEk
>>2387958I'm underweight though
I'm glad vendors give us the option, but at some point it's just cheaper to buy a 3d printer than to keep paying extra for overpriced boxes.
WOW ! Thank you very much for the library !
6m DX is hopping today. 30m was exceptionally busy last night (maybe 40m was closed?). Anyone remember any neat radio related 3d prints they saw online? Trying to search for some. I saw this multiband vertical with coil tap.https://www.thingiverse.com/thing:2030237/files
>>2388254My uSDX will transmitt on 6m but doesn't have the ability to receive.So I have to use a scanner to receive FM or AM.SSB is out.
>>2388325Maybe a frequency divider. They used to sell shortwave downconverter kits so you could hear them on AM radio for like $5. For TX it probably goes up to 2m, It's abusrd how the transmit on those work. The arduino chip acts like a soundcard ADC, slices it up at like 500hz then sends that via I2C to wiggle the generator. Makes sense for digimodes like FT8 but I have no idea how that works with SSB voice since there's only 3 discrete amplitude 'steps' available. Maybe I understand it wrong for SSB.
If you had a CW rig with a VFO knob to change the freq and you turned it fast enough you could do FT8.. That's what they're doing.If the atmel chip has enough oomf you can also spam the output on 3 diff bands/freq's. I think there's SI5351's with like 6 or 8 outputs, you might be able to do WSPR on all bands at once with very minimal code changes.The people that CQ on FT8 without giving a gridsquare and the ones that never respond I think are doing this, as a poor mans WSPR beacon since there's more reporters on FT8 than WSPR.
>>2388389>CW rig with a VFO knob to change the freq and you turned it fast enough you could do FT8.. That's what they're doing.No, retard, no it's not>The people that CQ on FT8 without giving a gridsquare and the ones that never respond I think are doing thisNo, it's the idiots, lids, and unlicensed thinking they're getting away with something
>>2388470>No, retard, no it's notYou're full of shit. Enlighten us then what other method they use to do Frequency Shift Keying rather than changing the carrier frequency.
>first time going to Hamvention>the majority of the ones attending I've met so far are either: overweight, neckbeards, balding, old boomers, or some of the combination of the above>of all the ones that are not, they're extremely fit and are preppers using ham radio as a tool for shtf, or skinny manlets who were obviously bullied when they were youngerAnd hams wonder why people look at them with disgust and need a PR team to promote them.
>>2388535Ham is for white collarCB is for blue collar
>>2388523>hurr durr>I do ft8 by keying down and twisting the vfo back and forth real fast>duuurrrrrr
>>2388555Compelling argument there anon.
To the autist claiming asking about electrical wiring preferences was off topic in the last thread
>>2388589>>2386067>Oh well why didn't you say so. Come right in.Nobody doubted you were doing POTA.Why THHN? AFAIK it's all stiff but if that's what you really want they have 14/2 for 41 cents a foot. https://www.wireandcableyourway.com/14-2c-thhn-pvc-tray-cable
>>2388604>THHNAs opposed to what? That was my question!Adaptable electrical wire akin to extension cords, zip code being the dummy, broad solution encompassing solar panels, radios, and connecting everything to a solar panel and battery.
>>2388609I think that's all normally GPT (general purpose). GPT 14/2 or 12/2 if you wanted ziphttps://www.mcmaster.com/gpt-wire/
>>2388822for SOTA/POTA use the screen could have been placed the screen on the large surface rather than end surface. As it is, it is more suited for car use.
>>2388854It looks like its detachable.If the buttons are also on the mic, you could flush mount it into a battery case
>>2388875>good ol' LCDfuck yes, there are some intelligent people left on this planet
>chinkshit shill threadWhat other amazing new things ya got there chang?
Building a mix of 10 of these tuners and noise cancellers to give out to friends. Learning printing as I go. Got a free icom base station out of it so far.
There is nothing wrong with Baofengs other than spurious emissions.
2 meter net tonight at 8.
>>2389006>There is nothing wrong with Baofengs other than spurious emissions.On a band for newbs where almost everyones using squelch and running FM, does it really matter? Oh noes, you're bleeding on me up at 450mhz said no one ever. China gear #1, they have the best redards.
Neighbor runs a 100% duty cycle beacon, I'm the only reporting monitor that's ever heard him.Leave alone or fuck with him?
I just got a UV82 what do I do with it
>>2389351Yeah but like why
>>2389356For whatever purpose you bought it for
>>2388822>>2388918>>2388875>If the buttons are also on the mic, you could flush mount it into a battery caseI hope they have an additional headphone/audio output on the mic meaning just one cable from the front for mic/headphone out/control of the unit via the handmic buttons. With SDR's getting tiny and Xiegu's last few qrp models having internal batteries I wouldn't be surprised if this also gets one, especially if it's output is under 5-10w. Having both of these features (multifunction handmic, internal batt) would be awesome and you could just toss this in a small softcase or sleeve and pack an antenna and handmic and you're good to go. Love how they made the top/front really flush and put subtle rounded bumpers instead of rails on the front/rear. I like the look of rails but this is a far more compact solution.Xiegu can't stop fucking winning.>>2388854Not totally wrong but this form factor does allow for the radio to stay mounted in a case/sleeve while it's being used, similar to production sound equipment in a mixer bag or studio gear in a rack. You could mount it in a bag/backpack and be able to connect antenna and mic without removing the unit and just unplug and walk away when you're done. This kind of mount can help keep stress off of the connectors and you can have a short cable going from the antenna to the side of the bag for faster antenna connection. I'm designing a soft case for a G90 right now and this radio would be a much easier project, haha.Picrel: backpack setup. Having the screen on the top also comes with the downside of making it harder to protect the connectors when setup like this. In a vertical setup like the G106 you could keep everything plugged in and have an easier time protecting it in a backpack.
Bought a house that has this tower on itIt's a commercial lease to a WISP though(Wireless ISP, get free internet from from the lease)What's the chance I can sneak some antennas onto it without them noticing
>>2388875>If the buttons are also on the mic, you could flush mount it into a battery caseVHF/UHF rigs fill the mic with buttons but I never see that on HF rigs (except some niche military gear). Any good reason for this?
>>2389732None. Just like the last time you asked.
>>2389749>any good reason for this?Icom and Yaesu seem to not fully understand what qrp users want, nor care to recognize how fast it's growing, and instead keep delivering bloated portable radios for their core demo who never leave the house. They are so focused on delivering new, slightly incremental HT and base station updates that their single qrp radio offerings seem like an afterthought. The Xiegu G90, x6100, and x5105 use an obvious clone of the Icom base station multifunction handmic which begs the question as to why they didn't put an cat5 port on the 705. This is what happens when your test user base and designers try to produce a mountain radio without ever actually going to the mountains.For portable/qrp radios you basically have a choice between the Yaesu and Icom tanks, Elecraft (expensive, waitlist), Lab599 (in Russia so a bit difficult to acquire right now), DIY kits, or Xiegu. Of these Xiegu is constantly bringing out new shit, and while it sometimes has growing pains at first, they are delivering affordable & usable qrp radios and bringing many people into the hobby.
>>2389950dang thought it was long enough ago I'd get away with itbetter picture of the tower than last time I thinkat least actually moved in getting shit setup slowly but surely
>>2390026The few same people post in this general. You cannot get away from it. Btw, how well are you receiving Marcus on that CB?
>>2389732Can you ask them if you can put things up there ?
The driven element of a yagi is normally a 1/4 wavelength dipole; could a 5/8 wavelength dipole be used instead? And I guess all the parasitics proportioned to match? What about spacing?
>>2389978>For portable/qrp radios you basically have a choice between the Yaesu and Icom tanks,Some Japanese brands had a long standing bad reputation for easily fried PA transistors, is still this the case?>Elecraft (expensive, waitlist),After they took some (unofficial?) deliveries to special forces, I would not expect prices to go down.>Lab599 (in Russia so a bit difficult to acquire right now), DIY kits, or Xiegu.I had expected more from uSDX and related. The first Chinese clones were a disaster, but Chinese truSDX sets are supposedly good. It would seem uSDX would be a platform easily modified for various improvements, including higher frequencies.>Of these Xiegu is constantly bringing out new shit, and while it sometimes has growing pains at first, they are delivering affordable & usable qrp radios and bringing many people into the hobby.It is hard to shake the feeling Xiegu are sub par reverse engineered Icom radios.
You could swap out the Tayloe detector IC with a faster one like PO3B3253A which should go to 2m and be a dropin, but the PA would need to be redesigned for a different part to transmit. Probably not worth it to try to do anything higher than 6m.
>>2390119pretty goodjust threw up some wire to see what I could gethaven't tuned it up yetI'll make a good vertical and/or maybe beam soonish now that most of my shit is movedhttps://www.youtube.com/watch?v=nJzkIzg_TKc
Might want to retire your golden screwdriver if you need an antenna to receive the bowl. Also Motor Mouth Maul is a white boomer. Despite what they sound like on the air very few are actually black.
>>2390539Won't deny that I'm not a retard who likes listening to the bowl for no reasonI get on sideband sometimes but I do way more listening than transmittingWas too lazy to connect my sideband radio for nowPower connector for it is wired in the truckAnd didn't feel like jamming clip leads in at the moment
>>2387648Just use an F connector TV diplexer.Forget that expensive shit.
>>2390719Do I need to use ununs with these?
>>2390723You shouldn't need them.
>>2389732I think you could easily with a ladder line vertical dipole or regular wire vertical dipole. What is the height of the tower? You could probably get a 40 to 20 meter straight vertical dipole up there. This general is full of brain dead faggots so the advice here is generally terrible.
>>2390733Additionally the hardest part would not be the dipole itself but hiding the coax. You could potentially couple it to any existing cables on the tower and then bury it until its wherever you want it routed. Assuming this is all legal of course but I doubt anyone is going to give a shit or notice as long as it doesn't interfere with the normal operations of the cell tower which could potentially be one of the only issues.
>>2390719They are for receiving only, they will not handle 100W
>>2390405>PO3B3253AI was not familiar with that one. Looking up http://www.potatosemi.com/potatosemiweb/datasheet/PO3B3253A.pdf>High Bandwidth Potato Chip Hilarious.
>>2390154and furthermore, could an LPDA include some 5/8 elements as well?
-EZNEC simulate it maybe?-What's up with China. Half my contacts are Japan but never China.-I'd think that the tower only cares if you put your antenna in the line of sight. They probably did a site survey when putting in the gear so I'd imagine they could notice a change, probably only if someone complains tho. Opposite side of the tower is probably outside the nearfield at those frequencies tho sooo..
>>2388822>>2388875>>2388918How much RF power tho, inb4 another gay ass 5W QRP bitch device. It looks interesting though.>inb4 hurr get the G90FUCK the G90, fuck overheating and fuck a waterfall spectrum in the field.>>2389732sneaking? 0.0% chance. The first towerman that climbs it, will notice and pull out what isn't on the tower datasheet.Have you considered asking the company straight up? If you make it known you'd like to co-use the tower for ham purposes, they will know you won't change your mind on a whim about having the tower on your property. It would cement the relationship between you and the tower owner.They might want to have a say about the installation and quality of used transceivers, to make sure it won't interfere with the WISP service. So you might not be allowed to do whatever you want, but you might just as well get a dualband antenna, or an HF wire antenna in there without a lot of problems. Just try it, you might just end up with whatever you want. They do might require you to have a RF site engineer perform some calculations or do a site survey.
>>2391012>FUCK the G90, fuck overheatingWut. Maybe you're feeding it 14.8v and it's burning off the excess? Not using a stand and having it sit on the heatsink?50% duty cycle full power doing all day FT8 mine goes to 120-130F. I sit mine on a noctua fan and it stays within a few degrees of ambient, i.e. can just barely detect any warmth. I've never had it thermal throttle. Not sure if there's an actual dedicated circuit for that or if they mean the mosfets inherent reduction in gain with temp increase. I *do* see heating of the various antenna coils/caps that I've used, if you're using an EFHW then I'd blame that if you're losing power with high duty cycle. I'd think the PA could even handle 100% duty cycle with the small fan but I imagine there's diodes and other shit that aren't heatsinked inside that would probably die first.
Literally all day every day 50% duty cycle at full power digital modes for months and no issues and no throttling.
>>2391031>>2391038>your average ft8 user earning awards
>seething boomer seething again
>>2390747I've put 50 watts through them no problem.Use them regularly.
>>2391628Does your diplexer do HF? Might want to put my 10m rig and my 2m on the same discone antenna. Also do places rent portable ladders? I need to get into my rental attic to put up antennas but it has this 2' tall sheetmetal 'lip' in the ceiling access hole so I need to stand about 8' before I can get in there.Tuning printer and learning 3d modeling before I bother making more ant tuner/QRM eliminator boxes, none of the 3d models online are 'ready to go' and have various issues fitting with the amazon kits.
7 more dB of EeEEEeEEeE action incoming. Hopefully by now the Xiegu's bled enough on the neighbors that they've fixed any problems this might cause.Anyone know if the icom CAT cable voltage is 3.3v or 5v? It's phono jack. I have a ton of 3.3v cables and there's mention of a 'level shifter' box that used RS232 (5v) so that makes me think it's possibly 3.3v.
>>2391708It only separates uhf and above from vhf and below.
>>2392389https://www.youtube.com/watch?v=1tG-g-TfBwwWhen EF Hutton talks, people listen.
>be looking at go box builds>encounter this videoI don't think this ham is really going anywhere.
I want to hook up antennas to a signal generator and amp for testing. what waveform should i feed it?
>>2393294*i mean what waveform should the generator feed the antenna
>>2393296Uhh, a sine wave
Personally I'd do AM, 1khz tone at 30%-100% modulation. That'd be a sine wave in a sinewave.I assume your question is 'should i do this square or triangle wave' and the answer would be 'no', those are dirty signals.
It's "sold"er, you dumb Amerifats, not "sod"der.
>>2393324Thanks. it's a lot easier to find square, sawtooth, and triangle generators than sine. Also thought it could be possible that feeding it a "dirty" signal could be a good way to test
>>2393414We aren't talking troops in battle; we're talking about metal hot glue
>>2393414Fragile, tiny wrists wrote this.
Had to make a custom CAD file for the tuner backplate which took forever to learn and source all the tiny ass screws. Finally making progress on tuners.>>2393424>square, sawtooth, and triangle generators than sineThose are easier to build. Triangle might be the least shitty. Output filters clean it up and turn it into a sine.>Also thought it could be possible that feeding it a "dirty" signal could be a good way to testThat's like trying to test a dimmable light bulb without a dimmer switch or calling the headlight relay in your car an 'amplifier'. Ignoring the whole concept of class A/B/C amplifiers. Use triangle if that's all you have. Ideally you should be filtering the input however.
18 hours to print a box. Still need to sand. Trying to get things perfect since the board kinda gets 'trapped' since it's soldered at both ends of the box. KrakenSDR became more of a PITA. They keep pushing back the shipping date and you need to bin and sort your coax cables so they all have exactly the same phase or buy theirs. Also wardriving with it would be illegal since it could pick up police radio.
>>2393599>wardriving with it would be illegal since it could pick up police radioimagine being an unlicensed fag like this queer
>>2393599>>2393632That's not illegal
>>2393633Depends on your locality, ass-fairy.
What do you guys do for a living?
>>2393649nothing im a neet
>>2393649engineer, support for telecom networks
>>2393649Engineer, started with telecom stuff dealing with tower-monkeys. Got into HF so I could play with it at home.
>>2393649Crisis Coordinator and Therapist.
>>2393649I work in media, anon.
>>2393599Majority of police radio traffic is encrypted these days anyway. I wouldn't worry about it. Certainly no cop pulling you over is gonna understand what you have or care.
>>2387557Got one of these a little while ago, pretty damned amazing performance for such a small unit. I noticed you need to ground the unit if you want to maximize its potential, and there's no ground pin so basically attach it to any other ground point of its chassis.But once you set it up, oh man, it can pick up clear signals my other sets couldn't pick up at all. And with NR on, many ham operators sound like local basic FM stations, it's incredible.
>>2393805>2 rubles have been deposited to your acctThanks for the honest review, Ivan.
>>2393871lol, it's not a Malachite, it's a Malahit. It's a knock-off of the original russian radio.
>>2393796>Certainly no cop pulling you over is gonna understand what you have or careI only brought it up because a ham today was getting grilled on whether his stuff could pick up police traffic. If a cop asks me that I'm going to say 'no' for good reason. Cautionary FYI to avoid having your dumbass hauled off to jail, I did my due diligence providing a 'oh shit, i didn't know that' warning. When a cops stroking your cock acting all impressed about all your mobile gear and complimenting you, think about it for a second before you answer him. p.s. Good job weekly off-diy-topic fat-ham complaining anon for crying to mods that I'm trolling you.I said it once, I ain't saying it again. I'm back quiet on the swirly bowl.
>>2393896Are there states where having a scanner is illegal?
Put about 20 orders in for that Belarus Belrig shortwave receiver months ago. No matter how many times I talk to the bank and they give me greenlight that shit still gets blocked. >>2393907I ain't saying it again.
>>2393907Search engines are your friends.
>>2393914So only a handful of states outlaw using police scanners while driving
>>2393805That's all impedance matching, not a reflection on the receiver itself to extract a signal.
>>2393917Wew. Thanks. I can ignore the Jew Yorkers in the forums then.
>>2389732tower tech herethat shit is leased and you WILL get pinappled up the ass if you throw your shit on there
>>2393931We already went over this. No, he has a shitty generator that can't emit even a basic RF signal.
>>2393927Bare in mind that's just using it while driving. No state disallows you from possessing a police scanner in a vehicle or otherwise.
>>2393649Tower Monkey that the engineer guy directs
All this rf frequency gen reminds me. I've got an HP 606A RF gen in storage. Should I sell it on at this point? Have never used it since I bought it at a thrift store other than confirming operation. Could probably put it up on my local ham club mailing list.Mines the rack mount version no case.
>>2393934At some point you can realize the engineers are retards baffling you with bullshit or they're skilled. 90% of the engineers are just retards, the smart ones got promoted.I interviewed a guy with a doctorate in electronics, applying for a hardware clock job, and he didn't know what a PLL did. >>2393937Put the witchety grub on yer c**k
>>2393938I knowI had to deal with a RAN Engineer that did not know the difference between RTWP and VSWRlike fucking how??? Granted it was a woman
>>2393942Do you need a diagram? Put the grub, in your c**k.
>>2393937It would cost a few pennies to buy a tool with 10,000x more accuracy. Nobody has nostalgia for shit tools when it comes to measuring/calibrating stuff.
>>2393424You could use a low pass filter to clean the signal. Many SDR transmitters such as uSDX have good low pass filter designs based on square wave inputs to class E amplifiers before feeding the resulting signal to the low pass filter.Dirty signals are full of harmonics and are therefore a nuisance to others, possibly emergency bands, and also unsuited for the test you really want to do.
>>2393649These days I am a consultant, but I was in the military when i learned Morse code and got the license.
>>2387570What schizophrenia look like in one picture
Why are SDR usb dongle so shit at picking up signal?
>>2394259It has only an 8 bit ADC, so it is easily overloaded. A good antenna and proper filters will help. You can either filter to pass through the band you want to listen to, or you could you a filter to exclude broadcast bands, that tend to use powerful transmitters.
>>2393927New York you can listen to your ham frequencies if you have your ham license.
Had my uSDX connected to my coax.My somewhat horizontal dipole outside has a grounding lug with a gap protector for the coax going right to the grounding rod.Coax maybe goes 60 feet into the shack where I have the same kind of gap connector and a ground here.I have DC power from car batteries, also connected into the grounding system, going to a connector to plug into the radio.I already have the radio on and connected to the coax.Go to plug it in, sparks come off when I bumped the plug against the body of the radio.WTF happened?Is it because my batteries have a huge amount of amps?The positive and negative aren't reversed.We had a thunderstorm maybe 45 minutes ago.I don't know if that played into it.
>>2394443On top of this I felt current on the barrel of my 120 to 12v adapter going into my preamp for my scanner.
>>2394443>>2394450maybe you have a floating voltage somewhere, 120V to 12V adapter might be the source : that means ok you have 12V between + and - of the device but it is not in reference to the ground, so there might be tens or hundreds of volts between the + or - of the adapter output and groundsparks mean high voltage, not high current
>>2394451Yeah.I want to try a different power source for that preamp and go from there.
>>2393947but the knobs and geared selector feel so gooda work of art I dare say
>>2394685nice job !
>>2393649Software engineer. I needed a radio form my boat so when I inevitably Dunning-Kruger myself into drowning I could scream in to the ether void for help
>>2393937A quick check on the net shows this is a pretty good device, as can be expected from Hewlett Packard. It most likely works so you could use it if you have a need for it.Alternatively it would go well with boat anchor collections, so it should be possible to sell.
TFW too much clutter on desk to setup new radio, too lazy to clean.>>2394626I mean, you could scavenge the roller inductors and variable caps from it. Not sure if it even has roller inductors. I have some old WW2 radio gear I just hold onto, probably useless but don't feel good about parting it out. That'd be useful for setting modulation and S meter, maybe for aligning a CB radio. It's one of those things where it's not very accurate and you have to wait 10+ minutes or an hour for it to stop drifting. Combined with limited tube lifespan and random high voltage shit you get from then it's just too much of a PITA to deal with.Modulation and the attenuation are the key 'features' of that over a cheap alternative.
>>2394940>>2395089the duality of man
>>2394443I had a cheap 12v car battery charger and it would make 120v read off the car battery, go figure. Don't leave charger hooked up while you're using it, it's probably noisy as hell anyways.>>2395136It's hooked up. 3.3v cat cable doesn't work or I'm doing it wrong, specified the hex address, 1200 baud, default settings, yadda yadda, no SSB power transmitted when I hit the 'transmit' button with in/out audio hooked up. Are you here to DIY or sit in the peanut gallery?
All so tiresome.This thread consists of one other person who built a kit in the last few months, a smartass boomer that doesn't build anything and offers only kneejerk rude platitudes, and the occassional newb that wanders in to ask stupid questions.Screw you guys, I'm out. There's nothing of value here. Also fuck you boomer with a pokey stick.
>>2395424>doesn't include himself, the trolling low-rez frog posterOh no! Attention seeking retard #564894 is really going to leave this time, fr fr no cap
>>2395424What did you ever contribute?
>>2395424Maybe you should have contributed more, Patrick.
>>2387570thats not a colostomy bag, look closer it's a regular plastic bag with spaghetti color branding.
>>2395424I fixed a vintage radio today, fucking doomer.
>>2395424I just built a portable crossband repeater to use when electricity is out. Basically a go box but the radio has crossband capabilities. I'm just waiting for the solar panel to arrive. What have you done? Oh wait, you are not here now.
>>2396210What batteries are you using?
>>2393805Hello. I have one like this v3 ver 1.10C. My radio body is made with Circuit board (PTFE) and there is no way to ground the radio without opening it. I'm thinking of grounding it using one of the SMA inputs. Do you have any suggestions? Grateful.
>>2396292For now, sealed lead acid since I wanted to use mostly what I have onhand. Once they're done, I'm replacing them with LiFePo4 batteries.
>>2396590>LiFePo4 batteriesLithium Iron Polonium?!wowzers
>>2396868Polonium's Pu (literally because it stinks as in sucks)
>>2396868Nuclear power for radios must be the ultimate dream for preppers. You can get 100 mW from one ton depleted U.
>>2396868Lithium Iron Phosphate.
>>2396868>Lithium Iron Polonium?!Yes. I'm going to need that serious power. I'm just worried that the radioactivity is going to cause some RF interference.
>>2396960 >>2396992I guess ITU and FCC forgot to regulate neutrino communication.
>>2395424>one other person who built a kit in the last few monthsI appreciate the recognition, anon.
Any recommendations for solar panels with Field Day coming up?
>>2397359powerfilm lightsaver, if you can afford it
Can anyone recommend an old RF signal generator that can generate a sine wave up to about 1GHz. or convince me to just make one.
>>2393932Not quite. This might just not be the thread for me, but I am interested in 900 MHz to at least 2.4 GHz.>>2393321>>2393931For 900-2400MHz, will a triangle wave suffice? This will just be for testing purposes. I'll probably only be feeding it about 400mW. And I will just be feeding it a single un-modulated frequency at a time, and only for a few seconds to maybe about a minute
>>2397985>will a triangle wave suffice?>single un-modulated frequencyYou will not have a single un-modulated frequency unless it's a near-pure sinus wave. All other waveforms are composed of sinus waves, multiple. The exact opposite of a single unmodulated frequency.
>>2398058>All other waveforms are composed of sinus waveshuh?
>>2398197Fourier transform, something like that, to make any kind of signal, you need a set (maybe infinite) of sinus waves.
Anyone know some good RF fundamentals courses available for free?I'll confess I know almost nothing about this but need to for a project I've got coming up.While I won't be doing HAM radio, I'll need to know about transmitting medium range 2.4ghz signals from remote vehicles.Anything about antenna positioning, antenna selection, ensuring transmission levels are within legal limits & data validation will be perfect
>>2387557Do you guys recommend a cheap portable or SDR w a laptop for casual Shortwave browsing? I'll be running about 18' of speaker wire outside for the antenna either way.Also, rate my shitty CB dipole. Believe it or not, fucker gets out there.
>>2399728>Anyone know some good RF fundamentals courses available for free?Did you check out the FAQ? It has a link to a free book. It might also be in the library posted by OP.
>>2399741>shitty CB dipole>fucker gets out thereDoesn't sound shitty to me if it gets you on air.
>>2400092Ugly & thrown together I guess, that's like $30 in parts. I even used some old 75 ohm RG-6 coax (w adapters) I had laying around & got it to a flat SWR at an 84 foot length run.I think I made an old Ham boomer friend I know mad. He was convinced it wouldn't work & told me I was stupid ("get an Antron!"). I hit him up all the time in the next town over at 25 miles. Kek.Anyway, shortwave bros? Is it worth it at all?? Southeast US and plan on doing a simple SDR dongle w a speaker wire antenna on the roof (hidden inside the roof vent).
>>2400110>I think I made an old Ham boomer friend I know mad.There's this geezer here who keeps commenting on my CW skills and gets everything wrong, it's as if he's imagining things or hearing somebody else.Boomers aren't that bad, but don't listen to the retards.
>>2400110>Anyway, shortwave bros? Is it worth it at all??Of course. Imagine CB when the bands are wide open but you can pick a band that's open all year round, even in solar minimums you can do some DX.
>>2400113They all seem to put on fronts like that. He is experienced is the thing & a nice guy, and I do like shooting the shit w him tho. Oh, I also commented once I was gonna get a radio w FM since now that its officially approved here maybe more will use it. Well, he didn't like that either & thought I was lying. Had to direct him to the FCC site lol. I still don't think he believes it, even tho I have an FCC Thomas AM/FM sitting here.>>2400115Sounds fun. What's to be heard on there usually? I tried playing w some online SDR sites but a lot of noise mostly. Is it specific bands/frequencies where the party is?Unlike the boomer, I for one do NOT mind admitting I'm a complete retard in this regard & don't know everything, so any info to get me started down a path would be helpful.
>>2400115>>2400126Oh, and would this little dipole work well for shortwave antenna? I made it using old speaker wire (about 8 feet in each direction) that I'm gonna slip into the roof ridge vent so its high & hidden (HOA shits). I'll be feeding it to the SDR dongle with an SMA to PL259 coax.The reason I don't wanna use all speaker wire everywhere is because the feedline part will be going through an attic & I was afraid of RF interference. Sound reasonable or dumb?
>>2389732>commercial leaseI'm in contracts class if you want to post it
>>2400126>Sounds fun. What's to be heard on there usually? I tried playing w some online SDR sites but a lot of noise mostly. Is it specific bands/frequencies where the party is?That depends on propagation conditions entirely. Easiest rule is higher bands tend to work during daytime, lower at night, with a general shift towards lower bands in winter. It's more complicated though.Hams do SSB, CW, all kinds of digital modes. You can do FT8 if you want to feel as mobile and active as the oldest ham you've heard on the repeater.>>2400140>Oh, and would this little dipole work well for shortwave antenna? I made it using old speaker wire (about 8 feet in each direction) that I'm gonna slip into the roof ridge vent so its high & hidden (HOA shits). I'll be feeding it to the SDR dongle with an SMA to PL259 coax.8 feet each will be somehow a half-wave dipole for 10m. It'll do for higher bands reception.I don't get what feedline you're using?
>>2400151>I don't get what feedline you're using?Just a simple RG58 (SMA to PL259) that'll connect from the SDR dongle into that banana adapter you see (w the speaker antenna leads coming out).The speaker wire itself will be outside, everything else inside ran through the attic. Was thinking this would keep the speaker wires isolated if I did it this way? I didn't wanna pick up RF interference by making it all one big speaker wire ran down into the SDR. The connection needs to go through some funky shit to get into the shack.
>>2400171>coaxIt'll be fine for the higher bands to listen in to some QSOs. If the coax outer conductor is grounded all should work well.
>>2400181I don't believe it'll be grounded in any way. Other than just a straight connection.Is there a reason I should, and how exactly?
>>2397975As far as DIY, cheap signal generators are available from the chinks for cheap.Anything over that gets expensive fast.I use a chink one, and for everything over that just build crystal resonators
>>2400190Well with most rigs it's that the coax outer is grounded or levelled with the rig's chassis anyway.
ran some ethernet cable outside and now i get tons of noise on HF. will shielded cable fix this if i ground it?
>>2400370Maybe. Play with link speed and duplex.
>>2400403will do, thx
Anyone else made one of these? https://vk2zoi.com/articles/dual-band-half-wave-flower-pot/
>>2400370Try shielded ethernet cable.You might want to make small wire ground leads if say for example your router is plastic and doesn't bond to the metal ethernet plug.Also, this fucking Google keyboard!The keyboard keels wanting to captialise ethernet in the auto fill.
>>2400190I generally get better reception for example with a dipole if I ground it.You think with an interior dipole such as in the attic, you wouldn't need a ground just thinking about protection.But I've found grounding greatly improves reception, particularly if you can get the resistance down and avoid ground loops.
>>2401090Can a device have 2 ground wires nominally parallel each other leading to the main rod?Or would this lead to ground loops?Like appliances often have the third pin, but are you also ok with running your own ground line to the main rod?Like what if this parallel ground line has a grounding rod at the half way point in the length, but still leads to the main rod, would there be a problem?
>>2401112>How do I properly bond ground points?>What is the difference between RF ground and electrical ground?>How do I avoid ground loops?
>>2400403>>2401086reducing speeds to 10mbps worked pretty well. duplex didn't seem to matter as much. tho my dumbass set the routers eth0 port to 25gbps so i've had to play with reconfiging everything on there lmao
>>2396590You're asking for a short that your fuses won't protect against when one of those alligator clips tips over and bridges the two battery leads.
Someone is generating a tone on SSTV freq. on 20m 14.230MHz that crashes QSSTVgood job, I mean I am pissed off but good job
>>2401911got recording of it?
>>2401912No, it was not a tone at one freq but something around the two vertical barson the audio spectrum of QSSTV, I have no idea what it isvery strong signal in France, 9+10
>>2401189You didn't answer anything.
>>2401112your ac ground and station ground are different. iirc NEC code requires that you tie all grounding points together but nobody actually does
>>2402304>t. lazy idiot
This is my miniwhip antenna (10kHz-30MHz), which I'm going to upgrade by adding two more side plates.I live in an apartment and this is one of the few active antennas I can use.As a power source, 3x18650 batteries will be used, totaling 12.6V and the battery charge verification will be informed by a charge indicator module which will only be activated by a pulse switch.I chose the option of using 18650 batteries because the antenna can be used in camping areas.After finishing the equipment, post the images of the final result.
>>2402576>battery powered antenna>amplifying apartment noise>used in camping areas
>>2402380That's you. Give a real answer.
>>2402612>only statements, no questions asked>I demand a real answer
>>2402606Kill yourself you worthless boomer faggot. This general is really full of the dumbest motherfuckers on the entire planet. Go get fucking dementia or something from your shitty seed oil mcdonalds diet and then get abused in an elderly care home by a nigger or spic that your kind imported into this nation for cheap labor. Fuck you. I cannot wait until every fucking baby boomer faggot is dead. Go back to whatever fucking forum you use.
>>2403100I believe, perhaps, you should go back sir.
>>2403100>This general is really full of the dumbest motherfuckers on the entire planet.Ironic, coming from a 'tard like you.
>>2403306You are not fitting in. Go back to whatever fucking boomer hive you came from and go be retarded over there.
>>2401189>groundYou can spend decades learning about that, nobody really knows and everyones does it wrong, including the equipment makers. Enjoy an almost 300 page read: http://k9yc.com/GroundingAndAudio.pdf>>2402576Probably should just go with an MLA-30+ or the sister version that already has an 18650 and goes up to ~150mhz but a miniwhip is what I was going to try for the 100-500khz stuff.If you're not trying to grab *everything* from 0-30mhz at once with one antenna you would be far better off using a tuned magloop if you're just listening live and don't plan to record everything. Easily 20-30db better SNR.Go die in a ditch boomer.
>>2403578>gatekeeper anon has spoken
Boy I'm glad this general is full of drama queens instead of people that like to build stuff and help others. /s . Glad I left.
>>2403651>low rez. frog and resident boomer hater announced he's leaving >>2395424>continues to post>calls others drama queensK, bud.
>>2403644>Go die in a ditch boomer.Why are you so obsessed with boomers? Do you have a secret crush on a boomer? I have to assume it's like a 60ish year old man and that's the true reason you frequent ham related threads.
Are there handled that can do SSB on VHF ?
Anyone here diy a ham radio? Been wanting to know if it's worth the effort or not.
>>2404366Stick to CB, only person here is an insufferable tech that's still struggling for months on what wire to buy.
>>2387557In 2021 the FCC approved FM for CB radio, today we have 1 handheld radio on the market(that i have found) with AM and FM: the President Randy II FCC. This totally modern brand new design with all the greatest features and bells and whistles still lacks 1 feature I have never seen in a handheld CB radio: SSB.Why?
>>2404390Im trying to integrate packet radio into a mobile router/general purpose base station. It was more of me wanting to know what bits should and shouldnt be diy'd, since at some point I want to scale production of these.
>>2404417Cherokee AH-100. More modern would be Magnum 1012, I posted mine here a while ago doing FT8.Nobody runs SSB on 38 except hams with their ham rigs. Nobody legally has an 'unlocked clarifier', so you have a bunch of shit radios transmitting several hundreds of HZ off from each other. Ain't nobody got time for that. Doing it handheld would be equally useless. Also the circuit complexity explodes massively for doing SSB. SSB only made sense in the 70's when all 40 channels were jam packed, now you have 1-2 channels that are mostly idle and people are so far apart they need amplifiers. My squelch hasn't even broken the last two days.
>>2404484>SSB only made sense in the 70's when all 40 channels were jam packedSSB also packs the juice you have into a smaller bandwith and has better performance on lower signal to noise ratios.At least that's what I've noticed when being confronted with received weak signals in FM and SSB.
>>2404484thanks for the explanation and couple of lesser known radio examples.i understand your point about the spectrum being less crowded, but thats not really the point, someone in the field with a handheld unit could be trying to hail someone in a jeep with a mobile and fail because mobile rigs would be on SSB.buying a handheld CB kinda feels like im being put at the little kids table.
>>2404417CB radios have always had FM, what are you talking about?
>>2404638you know i was about to type out some smart ass shit about peaking and tuning, and then looked at your pic first, that's interesting.https://cbradiomagazine.com/fcc-approves-fm-for-usa-cb-radios/
>>2404484The Magnum 1012 is a 10 meter amateur radio. nice to have for that purpose but not legal as a CB.That Cherokee AH-100 though, is a CB and DOES have SSB which is indeed what I was looking for. Too bad it's not for sale anywhere.Also that thing is decently sized but not huge, and from 1996 so we have 25 years of advancement and miniaturization; I think that Randy II could incorporate SSB for probably around zero overall size increase.https://www.rigpix.com/cbfreeband/cherokee_ah100.htmI mean look at the Midland 75-822, that thing is dated 2012, 10 years ago and significantly smaller than the Randy II.
>>2404661You know, you'll have to find some other autist that has a ssb radio, within range, to talk to, or do you just plan on broadcasting into space?
>>2404712>You know, you'll have to find some other autist that has a ssb radio, within range, to talk toI live in an area with somewhere around 3 million people including a massive outdoors & motorsports scenes. The autists exist.>or do you just plan on broadcasting into space?https://www.youtube.com/watch?v=dMqxx-ZCyTY
>>2387557I have been shopping around looking at what my options are for upgrading my portable hand held radios to take with me on my travels.I'm looking for unlicensed or Amateur or cheap/easy licenses to utilize. I currently hold an Amateur radio & GMRS license.>inb4 SDRI have a HackRF & RTL-SDR SDRs for monitoring that which I can't talk on. like air band, business band, am radio.>inb4 baofengI have the Baofeng UV-5X3 already. I want to upgrade to non chinkshit radios.2-Way Radio services I know I *could* utilize incl. Amateur(Technician), CB, MURS, Marine(I do own a vessel), GMRS(Licensed), FRS, and a number of LMR/SMR bands.Anyway what I'm really looking for help with is if anyone has any brands they would like to shill or honorable mention that make any 2-way radios and I haven't looked into yet. NON chinkshit please.I have already checked out the websites of Alinco, Cobra, Dakota Alert, Galaxy, Icom, Kenwood, Midland, Motorola, President, Uniden, Yaesu.Thank You.
>>2404886here with a side note since I hit limit space.I have a Yaesu VX-8DR w/ APRS & Bluetooth so I do get 6 meter, 2 meter, and 70 cm, but it looks to me like the amateur handheld market is dead outside of the 2 meter and 70 cm radios.I would think handheld radios exist for 12 meter, 10 meter, 6 meter, 1.25 meter, 33 cm, 23 cm, and 13 cm, but the market is completely dead/nonexistant.Can anyone honorable mention any radios from the past that I could look into to fill the gaps?
>>2387557Is it possible to change the clock on the IC-7300 to an American style 12 hour format instead of the default 24 hour?>pic unrel
>>2404592>but thats not really the point, someone in the field with a handheld unit could be trying to hail someone in a jeep with a mobile and fail because mobile rigs would be on SSB.Bruh. #1 perhaps 100 people in the entire country use SSB on CB, none of them are mobile, and they're just hams shooting the shit from 10pm-midnight. Nobody mobile ever uses SSB#2 Someone listening in SSB mode can hear someone using AM, FM and SSB just fine, but this doesn't matter because #1, nobody uses SSB#3 Nobody is going to hear a handheld beyond 1/2 mile unless you're on a mountaintop talking to another mountaintop.>we have 25 years of advancement and miniaturization; I think that Randy II could incorporate SSB for probably around zero overall size increase.Completely diff designs. AM Rigs use the transformer that normally drives the speaker to also modulate the audio on the final transistors. SSB rigs would do a driver before the final. Just look at any SSB CB radio schematic. Cobra 148 looks identical to a Galaxy inside. Someone designed the shit 40-50 years ago and it's pretty much been left untouched.
Hello my friends! Greetings from Brazil !Yesterday I finished assembling my miniwhip antenna.I just did some tests from my laundry window, on the tenth floor of my building, at 11:00hs!!!Excellent reception on the 40m band and the noise was suppressed due to the good grounding I performed and the result can be seen in the waterfall of my Malahit. The two side plates have incredibly boosted reception. I also did a quick test on the CW decoder.This week I'm going to do some tests on the balcony of my apartment, which faces the North.I'll post more pictures this week.Thank you for your attention and here is my simple contribution to you. Any questions, send messages!!!Good Sunday everyone.
Anyone have any comments or opinions on the Elite 750? I'm thinking of getting one and hooking it up to some external antennae and line out to PC.I know there are some more dedicated SW radios and AM radios people recommend for those respective uses (Sangean/Tecsun come to mind for SW, Sony for AM)Looking at the LCD screen on it I'm not sure I see room for HD Radio info on it, doing a search of the manual for HD turns up 0 results. FM turns up 90.https://etoncorp.com/collections/all/products/elite750https://cdn.shopify.com/s/files/1/2407/2229/files/200423_SpecSheet__Eton_Elite750-update.pdfhttps://cdn.shopify.com/s/files/1/2407/2229/files/E750_Manual_200408_6348f12e-f088-4ccc-a2a7-e0b54d71f7a4.pdfIs this thing a $500 meme?>Pic is best closeup of front I could find, and some dumbass shooped in fake LCD stuff onto a powered down unit.
>>2405461I don't have experience with this, however it looks nice and Eaton/Grundig is no slouch. Seems it's an updated Eton Satellit 750.
FM antenna question... more /ham/ than electronics. Want to build a simple wire FM antenna from speaker wire, don't want a 1.5M dipole, for space reasons. Was thinking about something I could build or 3D print and wrap some loops around that would be less than shoebox size. Or maybe just a mini dipole with... 10" arms? Basically just trying to figure out a size.Receiver is a Sony bookshelf system; it just has 2 speaker wire clips to add the antenna. Urban use, so don't need much range. But with no antenna at all this thing won't pick up any stations.
>>2404484>now you have 1-2 channels that are mostly idle and people are so far apart they need amplifiers. My squelch hasn't even broken the last two days.Even if your local region is full of non-radio cell phone fags, how is that even possible with the current solar cycle conditions? The past 2 days nearly ever channel is jammed at certain parts of the day, and its only up from here for 5 years at least. Northeast Florida so maybe that matters.I agree w you on SSB. Its mostly worthless now & constant clarifying sucks. Its only claim to fame was the crowdedness of AM mode, and slightly more watts. But everyone runs amps now so it doesn't matter.I actually ended up selling my boomerfied SSB because 38/39 LSB were literally the only active channels across it all, and those were just people shouting out for calls (can do plenty of that on AM). I used the money to buy a Thomas AM/FM and a small linear. Way better combo IMO for the money.
>>2405667>FM antenna88 - 108 MHz, average 98 MHz. So wavelength is 3 m. A dipole is half wavelength, 1.5 m, so each arm is about 75 cm.Speaker wire is OK. Positioning is also important, there is some directivity with dipoles.
>>2405667>Urban use FM broadcast bandstick a 8" - 12" piece of wire in the antenna side, leave the ground terminal unused
Just looking for something cheap to listen to shortwave and other radio, ideally on my computer or something I can plug into speakers. I am not too knowledgeable on this stuff but would something like this https://www.aliexpress.com/item/1005002890061651.html be good or should I get something like a UV-5R? Generally just want to listen to as much as possible, don't intend to transmit anything.
>>2405865Your link points to an SDR that can't do HF, only UHF.If you want cheap, perhaps an RTL-SDR V3 with dipole antenna kit is a choice.I have an RSPdx which is on the expensive end.
>>2405870I see, thanks for pointing that out. I'll look around for something like that.
>>2405876SDRPlay or Airspy. Pair it with an MLA-30+. You can try playing with built in Bias-Tee or use the one the MLA comes with. Open the MLA-30+ box and adjust gain up most likely. Get it up as high as possible.The cheapass option would be a balun one-nine and RTLSDR-V3 but the more expensive SDRs have much better filtering in them. Also the balun one-nine would only really be good for whatever band you cut it for. You'd pretty much have all the local AM/FM stations overlayed onto HF randomly with this combo because of the lack of filtering. >>2405461Cheaper tecsuns would likely perform just as well. I'd try to get the Belrig or the Malahit IMO. https://belrig.by/ there's a few other vendors that sell it too.
>>2405882I think I'll go with the cheapass option for now and later if I decide it is the right thing for me I'll get something like the Airspy HF+ Discovery or RSP1A.
>>2405882cant get belrig site to load, malahit isnt american.
>>2405842S FL. Everything is either N or S. >>2405857Thanks I'll give that a shot.
>>2405870That's what I did. We'll see how it goes.Is an 18'-20' (total) speaker wire dipole OK for shortwave & some ham bands, or should I try to run more? It'll be outside on the roof & I'm feeding it with some reguly RG6 75 ohm TV coax into the shack.
>>2387557for your guys' enjoymenthttps://carcbradios.com/what-is-a-cb-radio-repeater/
>went to local ham radio group>every single person is old, fat, balding, and wears glassesThe meme is fucking real.
>>2406043Small improvised antennas still get the strong signals for you, but you won't be picking up weak ones or DX.I started SWL using a ham rig and my curtain rod connected as antenna.
>>2406009>S FL. Everything is either N or S.In that case place the arms of the dipoles horizontally East-West. You might also want to try it vertical.
>>2406223How many feet do you recommended for decent DX? I was under the impression that that would be easiest to get with whatever length, but maybe SW works different.
>>2406376>How many feet do you recommended for decent DX?All of them.
>>2406379>All of them.kek. yeah for am radio (mediumwave) and shortwave you want the longest wire you can get.shortwave is the LF band, which is 3 - 30 MHz, which is 10 - 100 meters long.AM radio is pretty much the entire mediumwave band, which lies in the MF band.530 kHz - 1700 kHz which is 565 - 176 meters.I have heard of people clipping onto their gutters with good results.I'm not an expert i just spouted off some easy to find information, but my understanding with MW and SW listening is you need a closed loop(1 wire, both ends plugged in next to each other on the radio. so whatever length of wire you get will be cut in half if you just run it straight out. someone else with more knowledge can chime in on that one.
>>2406398shortwave is HF, not LF.
>>2406398Same. I've heard long wires introduce more noise tho. I'm in a general neighborhood too so it might be rough. A 40 foot horizontal wired dipole hidden inside the roof shingles is prob the longest I can do. At least that'll be "up there".I guess I just need to experiment. I have a 10/11 meter vertical dipole I can try it with too that's already up.
>>2406376>How many feet do you recommended for decent DX?Tell me how ambitious you are...
>>2406409when i was a kid my dad(who was a verified electronics and radio whiz) just cut a length of idk i think 14 ga thhn and stapled it to the back of the wall unit. it was good. also i know the common rule of thumb is higher is better for antennae, but i have also heard the am signals travel along the ground, so if you can just run a wire around the perimeter of the house in the crawl space you would probably do really well.
>>2406414You might pick up a low cost ex-Soviet model, I hear the Russians need money, desperately. The Krug was designed by the people the US didn't pick up from Germany at the end of WWII, and were instead sent to the Soviet. I must admit I am not sure about some of the more baroque details and crenellations.
>>2406428lol. i bet if its russian it could be had for a bargain, less than scrap. whoever is selling it is gonna pocket the money anyway.and then i would need 50k to throw around having it shipped and installed on some mountain or hill top somewhere.
>>2406428>I hear the Russians need money, desperately.Well you're wrong.
>>2406428>I hear the Russians need moneyThe Russian economy right now is one of the strongest thanks to Amerilard Land and their idiotic sanctions that lead them to linking the ruple to gold.
>>2406456>>2406525Tell me more Sergey!
>>2406376Try to get a long antenna but not too long if you want to listen above 20 MHzAlso for listening only, trim it so that the resonance is outside what you want to listen to.
>>2406593i thought we are supposed to be going into a solar minimum?
>>2406660nope. Not at all.You are 10 years late or 10 years early.bands above 20m are gonna shine. Boomers on 80m and 40m are gonna cry
>>2401189I thought this was in the general pool. ButA) you ensure the metals are all tight and the earth is packed around your ground rodB) rf ground is has no latent frequency carried over from any noisy electronics, so it should be ran separately to avoid contaminating your amplifier and ocillatorsC) ground loops are avoided by ensuring a hierarchical grounding system. No connections between rods, and no connections to multiple buses from the rods. No interbus connections, etc.
>>2403578Fitting in is for normies. I won't do it because it attracts feminists and lowlifes, without fail.
Hey guys I'm trying to learn about civilian radio in the US and I'm curious, I have seen mention of 800 mhz and 900 mhz LMR. is this SMR?and I also have heard about a low band 30-50 MHz LMR as well as business band, but found no official mention of either yet. I have been using cornell law to pull official rules and frequencies.
>>2406704heres a sample, i think its awesome how easy to read this is. and i would just about bet my balls cornell has correct up to date information.https://www.law.cornell.edu/cfr/text/47/95.563https://www.law.cornell.edu/cfr/text/47/95.1763https://www.law.cornell.edu/cfr/text/47/95.2763https://www.law.cornell.edu/cfr/text/47/95.763https://www.law.cornell.edu/cfr/text/47/95.963https://www.law.cornell.edu/cfr/text/47/97.301
>>2406710couple more i found.https://www.law.cornell.edu/cfr/text/47/73.201https://www.law.cornell.edu/cfr/text/47/73.603i couldn't find one for AM radio. and i also couldn't find one that breaks down the sub channels on HDTV like channels 2.1,2.2,2.3, it simply gives a MHz range for each of 36 channels.
>>2406700Study harder.>>2406704>>2406710>>2406713You're trying too hard.
>>2406725>You're trying too hard.i don't understand. learning about radio from an easy to digest legal website is "trying too hard"?
>>2406704Are you thinking of the ISM bands?
>>2389978>>2390184Is the Xiegu G1M G-Core any good?I want a cheap HF radio, because I know I will get bored with it fast.I want to try HF telephony 2-3 times and then maybe learn CW, that's it.I was waiting for the qsx to come out, but that is obviously never happening.
>>2406972>I was waiting for the qsx to come out, but that is obviously never happening.Meanwhile there is truSDX which is very cheap and capable. Unfortunately it is not open source.
>>2406980wow, this is amazing, thanksmaybe I'll just get this to get started
>>2406732That guy is a crab in a bag. Ignore him.
>>2406994bucket, friendo. a bag of crabs would simply fall over and the crabs would get away. a bucket of crabs though, those are some pissed off crabs
>>2406972>>2406990>reddit tourist>>2406994homosexual>>2407034A refined gentleman, dare I say based?
Yay. QDX kits shipped. The more expensive SDRPlay's have a high Z input on a 3rd port or whatever which would be good for rando antennas and probably why handheld shortwaves do far better than the normal 50 ohm input ones. The normal 2 ports do phase noise cancelling which also would be helpful. IMO problem with the listening antennas is the impedance mismatch, that's why miniwhip guy can get by with a much smaller antenna. >>2405412Neat. Is the copper board attached? I can't tell if that bottom right coax is connected or just being near helped. The copper can solder together to form boxes too. A nut in the corner can be soldered to form a way to close it.
Greetings! An absolute stranger to SDR here.I have recently inherited a ham radio, and amongst everything there are several IQ files with a ".cap" file extension. What formats might I be looking at and and what software could have written these files?Sadly, I am not able to post them.Thank you most kindly for any help provided!
>>2407143Try your luck and open it as raw file in Audacity or some other wave editor.Other than that, get the SDR software for your PC that is recommended for the SDR they likely have been recorded with and open it, you can replay a whole piece of bandwidth on it.
>>2407199Tried my luck, Audacity recognized nothing. All the files start with ANSI null-terminated string "B.01.00". I really want to show you how it looks in hex editor, but I am afraid to disclose whatever metadata there is.>Other than that, get the SDR software for your PC that is recommended for the SDR they likely have been recorded withI am literally trying to find such software. What could it be?
>>2407244You have no clue what the brand and model of the SDR is ?
>>2407244This >>2407248Try SDR#, SDRUno, something like that. Perhaps search which one produces .cap files, sounds quite generic though, like "capture"
>>2407244monitoring this thread and i offer a suggestion, start with some generic open source software that works with plenty of SDR hardware, try the most popular sdr softwares or softwares for the most popular SDRs out there. it shouldnt take you too long to find a software package that can handle it.
>>2407268>>2407260>>2407248I have no clue what the brand and model of the SDR used to write those particular files were. Could be something professional. No hope with SDR#, tried it. Thank you, will keep trying more and more software. Any names posted here will be very appreciated.
Any Technicians here taken advantage of the new HF priviliges?https://www.arrl.org/news/arrl-board-meets-in-remote-electronic-meetinghttps://www.arrl.org/files/file/ODV/Second%20Board%20Meeting%20July%202020/Doc%2025A%20Band%20Plan%20Final-1b.pdf
>>2407297Done, thanks, nothing reads those .cap files.
>>2407421go make an account on plebbit and ask /r/amateurradio.overall the website and its inhabitants are dogshit, but niche shit like amateur radio sneaks through as worthwhile since powermods have no interest.
>>2407560Nope, wireshark doesn't recognize the format.>>2407453Thank you, done that.
QSY >>2407960SUPERBOWLERS >>2407960NEW THREAD >>2407960
>>2393649CTO of a company thats just big enough for someone to have that sort of job description