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For the discussion of electronics, tinkering, radio, amateur radio, and related electromagnetic phenomena and communications.
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File: 1425522766479.jpg (17.21 KB, 240x160, 3:2, man-headphones-configures-….jpg)

Have an excellent day.

List of some Ham Radio activities:

http://www.qsl.net/w2vtm/hamactivities.html

http://www.arhab.org/

Resources:

Component and parts sources:

http://digikey.com

Flat rate shipping. Great for transistors.

http://www.mouser.com

http://www.elexp.com/

^ Good prices on silver mica caps/ 1N34A diodes/ if American.

http://allcan.com/

http://www.minicircuits.com

Good mixers/ amplfiers/ etc.

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No.1090

test

File: 04063b766b48bee⋯.jpg (62.21 KB, 800x800, 1:1, 800px-Telstar_satellite-Cn….jpg)

I am not yet licensed and I had a question reguarding sattelites. Television sattelites such as Galaxy 1 are now decomissioned/retired and are in a state of limbo but still in orbit. Is it legal to turn these sattelites back on and begin transieving on them? Galaxy 1 is still in orbit, but it is marked as "retired".

Telstar 1 and 2 are also in orbit. Would it be illegal to broadcast on these if you were able to bring them back online?

No.1111

It would be, because the frequency bands are re-used on new satellites and thus you would interfere with them.

In general just transmitting on those bands, even unsuccesfully would be illegal.

And if you want to pirate voice coms, there are better thargets like the 255MHz US Navy milsats. And more or less all the TV satellites have some unused transponder capacity at the edges.

Just be aware that pirating satellites IS posecuted in usa an milsat pirats have gotten rather large fines.

Most pirates for those systems are in brazil and russia.

No.1123

>>1111 (reluctantly checked)

These Satellite frequencies ARE available on a technician's license.

No.1141

but why do they retire working hardware?

File: 1846fee4636e1ba⋯.png (18.25 KB, 300x288, 25:24, ClipboardImage.png)

Any aspects of Ham Radio that you despise?

I, for one, think digital voice is pointless. Yes, yes, I know the advantages, but I still hate it.

20 posts omitted. Click reply to view.

No.1134

>>1080

>nobody's actually done anything cool with it in a decade.

What about that high quality 300 byte/s voice codec that uses machine learning? It's still distinguishable as a voice codec, but the quality you get for 300 byte/s is fucking amazing.

I haven't seen anyone do that 2 years ago.

No.1137

>>1134

Codec2? Yeah, it's great, but right now it's at best another HF digital mode with no "system" behind it. And even 2,400 baud is still just comparable to what AMBE/IMBE has been doing for decades, just in a patent-unencumbered form.

No.1138

>>1133

Well for hamband stuff extreme range IS a plus.

And at the time when JARL designed D-Star, most public safety systems and other land mobile stuff was FDMA.

Only cellular systems and TETRA ware TDMA.

>>1137

Then build the systems?

This is amateur radio not motorola systems. Everybody bitches about D-Star, but at least JARL attempted to do something new and state of the art.

Start hacking in codec2 support to something like MMDVM. And the 2400A and 2400B have callsign fields and stuff like that.

But no backbone routing.

The P25 linked repeater stuff might also be a good origin point for that.

And the codec2 Rowe dude has been interested in making it TDMA to get more capacity and single channel repeaters like DMO repeaters in TETRA.

No.1139

>>1138

>And the codec2 Rowe dude has been interested in making it TDMA

? .. At a presentation at the CCARC Wyong field day back in February, he answered that wasn't a priority. He's currently hard for the neural-net thing though.

No.1140

YouTube embed. Click thumbnail to play.

>>1139

Ha– moments after posting, a video of that appeared on YT.

…unfortunately, it stops half-way through the questions (when a CCARC guy came in and announced the winner of the door prize, and Rowe bitched about the loud noises next door..)

File: 3653e8bc3dc7aff⋯.png (257.58 KB, 699x750, 233:250, RBS0Wya.png)

Let this be the Ham jokes thread (aka an excuse for me to post this)

7 posts and 3 image replies omitted. Click reply to view.

No.1064

File: c5ee9dfc415bc8f⋯.jpg (51.49 KB, 410x668, 205:334, lzebnpl3xiv11.jpg)

stolen from le reddits

No.1096

File: ef5a1359d882c11⋯.png (600.1 KB, 1063x759, 1063:759, h5mk6TV.png)

No.1113

File: 2105390b38e6fb8⋯.png (162.81 KB, 618x348, 103:58, boomerQRO.png)

>>1064

Ham radio + FTA satellite + cars

My yard is full of all sorts of homemade antennas BUD's Big Ugly Dish, and parts cars.

My neighbors don't talk to me much.

No.1135

File: 6fadb6849757ba2⋯.jpg (11.21 KB, 200x152, 25:19, jpfi2BH.jpg)

File: 81becc7e3285f8b⋯.jpg (40.73 KB, 429x360, 143:120, GXeDk95.jpg)

No.1136

>>1135

What does one call that ride?

The duke of health hazard?

File: d241b8c17a162a8⋯.png (21.54 KB, 220x293, 220:293, afcd3f76cab32e4.png)

Evening gents, wasn't sure where to stick this thread, either in /tech/ or /hamradio/ Decided to go with this section as a lot of folks are already talking about UHF,VHF and Microwave.

Let's swap some stories, shit on hardware (or show some off) or w/e else you people do out there.

No.1127

File: c40184a51895125⋯.png (275.04 KB, 500x326, 250:163, 0503513510350454.png)

No.1129

File: 50ae3bcc17e695e⋯.png (629.76 KB, 640x480, 4:3, Tuning_Screw.png)

File: 39cd5c93558ede4⋯.gif (2.95 KB, 382x273, 382:273, 2.4GHz_Filter.gif)

Ha. Makes me think doing microwave with scrap is possible..

No.1130

Anyone try out cnranger?

No.1131

File: 1806933be1c156e⋯.png (5.04 MB, 2048x1340, 512:335, 123456789456123010110.png)

No.1132

>>1130

Sounds fun, but unfortunately I'm not my own WISP, and I don't think it's going to be readily adaptable to HAM bands.

File: d3b19ef2b7f29de⋯.jpg (171.13 KB, 1184x1500, 296:375, 81 s5VwqdQL._SL1500_.jpg)

How is the baofeng UV5RA Radio for getting started, and learning the basics for a Radio Licence? Is there a better one for that price?

I am just expecting to listen to all the frequencies and understand ham radio stuff, not to talk.

and by better, I meant one that you can progress your knowledge quite far with, and or has many features to potentially explore.

Thank you

18 posts and 2 image replies omitted. Click reply to view.

No.992

>>989

Ya baofeng is a fine entry level rig, when one is aware about it's short comings.

Had a lovely demo on an licensing course.

Wouxun (cheap, but traditional superhet receiver) next to a UV-5R baofeng (with it's low-if DSP receiver) Both on 433.550MHz

And then keying up with a TETRA handheld on 427MHz. Lovely TDMA of the TETRA transmission made the baofeng give out all kinds of funny noises while the wouxun did not.

The 4x in price does mean something.

That does not mean I don't own any boafengs.

I have two of them.

No.1036

>>962

You get what you pay for. They're cheap. They're questionably legal. They do very little hand-holding. The software and firmware is garbage. Performance blows and is almost always worse than advertised. They fail in bizarre, counter-intuitive ways, and they fail all the time.

There's a difference between a $15 Chinese handheld, a$250 amateur handheld, and an $8,000 professional handheld. If a$15 radio was good enough, nobody would buy the $5,000 radios. No.1094 >>985 baofeng HTs blow the shit out of any name brand handheld I’ve ever used. Yes on the bench their specs are inferior. But comparing their ability to make a repeater contact they’re equivalent. Yes, it’s possible to get one with a piece of plastic jammed in the mic hole and your xmit audio will suck. But, you can buy three more HTs for the price of an icom microphone. So there’s push and pull. My last HT was a VX5R that I lost on a night training mission. If I lose my baofeng I’ll just get another one for$40.

I think it’s better to get a cheap HT than to spend years saving for an expensive one. Then you can begin deciding how invested you are in it.

No.1106

>>1094

I wish.

Any more RF dense enviroment and it shits the bed. Had to change from baofeng back to wouxun because the squelch kept hammering open on any setting when in some parts of town.

No.1128

I got 4 UV-5r for starters.

I figured I'd want 2 for a repeater, then at least one to give to someone else, so 4 total. One out of the 4 is now locked on one freq (maybe I'm too much a noob? any help?) but the other 3 are doing fine. UV-5r has CHEAP extras like 14" extra long antenna, cable to make repeater, extra big battery, battery case that uses 6 AA, etc.

But UV-9r is only about $32 vs$25 and its about 2x the power and (supposedly) water-proof and bigger standard battery, but extras cost more.

UV-5 weights 205grams with standard batt and antenna, vs 294grams for UV-9.

File: 1419382689795.jpg (2.53 MB, 4160x2340, 16:9, 20141108_221000.jpg)

Anyone here do any homebrew?

-Mod edit- 2015/11/08

This thread is dedicated to homebrew.

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No.1084

File: b9d383f78091159⋯.jpg (356.3 KB, 1200x706, 600:353, 20181228-230320-wspr-on-a-….jpg)

Tonight's project: WSPR on a Breadboard…

Uses a Nano clone, SJWfruit Si5351 breakout, RTC, a suitable low-pass filter (+ dummy load), and lifting the example from http://blog.marxy.org/2018/12/minimal-wspr-transmit-with-arduino-and.html with a few improvements (LCD countdown, etc.)

The drift on it at the start is nasty (-4), but wsjtx still decodes it.

No.1085

File: a0b021377816a1e⋯.png (109.76 KB, 1154x661, 1154:661, 20181230-wspr-to-zl.png)

>>1084

Sweet. It gets international with the same power (10mW) to light an LED.

No.1120

File: dd174ed4eef944a⋯.jpg (167.19 KB, 1024x728, 128:91, 20190303-090555-resistive-….jpg)

File: 95008146b73a249⋯.jpg (210.67 KB, 1000x833, 1000:833, 20190303-090650-resisitive….jpg)

File: fcc23af4f3558c8⋯.jpg (147.58 KB, 799x1000, 799:1000, 20190302-142113-resistive-….jpg)

File: dcf68e1a90ec2e3⋯.gif (26.8 KB, 993x438, 331:146, resistive-swr.gif)

Like a regular SWR bridge, except doesn't actually measure the Ratio (actually just the difference in impedance). Very good for using with antenna couplers, and often used as a cheap alternative to antenna analyzers when portable (no battery, generally small and light, and don't have a lot of parts to go wrong/burn out– easy to DIY too). It's what VK3YE's Youtube channel as covered a lot of lately…

This one's got metal-oxide-film resistors, but they're rated to 7 Watts, and they're reactance-flat to use on the HF bands. All-up, it's probably good for 15-20 watts temporarily (i.e: when tuning).

No.1121

File: 166c4c9235334a7⋯.jpg (203.63 KB, 906x800, 453:400, 20190216-185707-wspr-in-a-….jpg)

>>1084

QRP-labs is for fags. (Says the fullchanner using Adafruit parts..)

The local WSPR guys are a storm of flying credit cards buying up QRP-labs U3S kits. I've halfway-completed this atmega328p-based beacon based on the breadboard project, using the Etherkit weak-signal mode code at https://github.com/etherkit/JTEncode

The bit at the top is a second-harmonic-optimized low-pass filter, removable for changing bands.

Then there's a SI5351 DSS, a 3231 RTC, and a bare atmega328p.

The battery will go underneath the matrix board.

The SIL headers are for programming and recharging.

Coupling the dipole antenna will go through a 1:1 current balun. The '5351 has an output impedance of 50 ohms, which is helpful. The output power is software-switchable from 2mW to 10mW.

No.1124

File: 0a300d2ab1906ed⋯.jpg (193.46 KB, 1208x800, 151:100, cw-trainer2-unzip-for-sour….jpg)

The latest completed project: A fancy-smancy Arduino-based Morse practice trainer. Nothing at all special about it, it's exactly what it looks like (Arduino + 4-bit LCD + key-in + piezo-out) except maybe having built it in a single afternoon.

It started off as a hack of what was posted by HB9TWS on radio.cc (site is gone.. The archive.org copy is at https://web.archive.org/web/20180526162309/http://www.radio.cc/post/morse-trainer). Stefan's work was just a (straight-key) decoder, but I've added a morse drill.

It starts off with 'the 100 most common words in CW', but the testing pool can be changed by keying in "TEST1", "TEST2", etc., to get single letters, single letters 'with a cheat', long words, and symbols. I've tried to make it as comfy to use as possible (no hasslin' for making mistakes..), unlike other practice software I've seen.

There's also a basic Copy practice mode– keying in (say) "20WPM" makes it beeps the words from the current test pool continuously, where would try to write down what it's sending.

Sidetone changed with the likes of "50FRQ" for 500 Hz.

Source code included– its using that concat trick, so just unzip the image (perhaps after renaming the extension to zip first.)

File: 1429802910549.jpg (252.03 KB, 1200x1600, 3:4, ant_ham-radio_n7eo_klm-kt3….jpg)

I've heard you can use HAM Radio in combination with certain software in order to send files between computers. What sort of software/hardware, and what kind of bandwidth are we talking about? Can it work for streaming video? Would the microwave bands provide high enough data transfer speeds?

10 posts and 3 image replies omitted. Click reply to view.

No.781

Here's a list of GNURadio examples for sending digital files and messages. I believe you can use an audio sink instead of software radio if you want to use conventional transceivers. You should be able to use hackrf in place of usrp, but you'll need an amplifier if you want to transmit beyond your neighbors.

No.790

>>779

Small/no images.

If/when we get our hamnet thing running It's likely going to feature YaCy distributed search engine, Asterisk/SIP, repeater linking, a wiki, some nostalgic fuck is gona host a BBS and I'm gona stuff up an imageboard.

No.835

Pskmail works for basic jobs, no video and slow data files. I used to use it before real internet arrived and while at sea. Its free..

No.841

>>835

>pskmail

Fantastic– finally a reason to get off the Novice/Foundation licence. Talking to boring normie strangers is a fucking drag.

No.1122

File: 1457335227096.jpeg (215.25 KB, 907x1355, 907:1355, image.jpeg)

Pray tell oh hams, WTF is going on here??

4 posts omitted. Click reply to view.

No.663

File: 1464017376973.jpg (123.48 KB, 880x813, 880:813, 1446654310_563a31662ca49.jpg)

>>662

I was going to say parallax but your fancy word is better as thats not really paralax.

Obviously the power lines are behind the house not directly on top of it.

No.698

>>627

with the stucco-foam house I'd say they live in southern california, a shitty place that is wtf as it is.

No.1114

File: 27df4045a55d92c⋯.jpg (68.78 KB, 640x480, 4:3, proxy.duckduckgo.com.jpg)

>>698

>with the stucco-foam house I'd say they live in southern california, a shitty place that is wtf as it is.

Ive never seen power distribution like that in the US. And that looks like a concrete telephone poll which is also not really used here.

Also the wiring mess on the pole kinda looks like the illegal hookup crap you typically see in the 3rd world.

No.1118

>>629

Except my lad, natural selection does not really work in the modern world. We've got bright scientists who die without reproducing, and 70IQ Africans having 6-9 offspring.

No.1119

>>1118

Evolution gives zero fucks about living in space stations– it's all about staying ahead in the race with the microbes.

File: 9ff447026a5d256⋯.jpg (220.89 KB, 964x632, 241:158, article-2527641-1A39278D00….jpg)

When the final nuclear war comes, what are you going to do via shortwave? Are you going to mantain Global communications between America-Europe-Asia? Are you gonna sit back and just watch, or will you try to help society rebuild?

No.1049

>what are you going to do via shortwave?

Shitpost like I've never shitposted before.

No.1058

Get on 6666kHz and 10420kHz and cheeki breeki with the surviving ruskies. Maybe with some 3400kHz AM thrown in and 3900kHz EC thrown in.

No.1076

Everybody radios will be dead from EMP, except those who have vacuum tube (valve) radios. But then no one will have the power to run one. And who will listen?

No.1092

>>1076

The dreaded emp is still just the same kind of electromagnetic radiation your radio was designed to detect. Just too much of it. Keep your antenna and power connectors capped off and/or put your radio in an ammo can.

Most military radios today are tested to withstand a typical nuclear EMP. It’s not a death ray that will wipe out everything electrical.

No.1117

>>1092

On the bright side, it'll sure clean up the airwaves.

File: 1432342355218.jpg (43.19 KB, 500x340, 25:17, 1335122230936.jpg)

So I happened along something today, apparently 14.313 has a reputation for being full of shitty and unlicensed operators, cranks, and shitty cranks.

Plug the number into google and the first few pages are full of nothing but reports of these kinds.

Apparently there's a russian guy in Canada, VE1KFM, who's known for being either completely nutty or a complete troll, not sure which. The USA hams hate him, and he's technically broken all the regs, but Canada refuses to do anything about the guy.

Google that call, and you'll see even more reports and some pretty humorous recordings.

Anyone else ever heard things about or on this freq?

29 posts and 6 image replies omitted. Click reply to view.
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No.631

you know, for some odd reason, with my radio, I've never been able to pick up anyone on 14.313, are the signals too weak for my portable antenna? or do I just have bad timing?

but when listening to 27.025 however, I get plenty of chaos there, particularly around 0200 onwards.

No.635

>>631

I go on 27.025 and I just hear weird beeps

No.636

>>558

What a bunch of faggots.

>hurr these guys say MEAN THINGS they should go to JAIL REEEEEEEEEEEEEEEEE

No.637

>>635

THE NUMBERS

No.1115

YouTube embed. Click thumbnail to play.

>>635

>I go on 27.025 and I just hear weird beeps

Thats cb CH6 aka Da Bowl.

Mostly just redecks and dindu's running dirty 1-10KW amps yelling over each other on AM.

File: be96fb0bb02fc4f⋯.jpg (11.59 KB, 294x171, 98:57, images.jpg)

Have you ever encountered operators that talk the old days or just strange crap in general?

I am in close connection with an apparent legend from "The Liberty Net" his name is "Tommy-Tubes". If anyone remembers him you can reconnect with him on zello at

'the motley crews'

Working a VHF repeater in upstate New York when I was first starting out. I made contact with a 'Pastor', he hooked me right in simply because I was alone on the airwaves.

My major blunder with this guy was I gave him my personal phone number.

Since October of 2016 I have been close in with this 'Pushy-pastor-type'

An example of what life became for a while was…

2000 EST:

Ah! I shall go to sleep

2330:

*phone rings BBBZZZZZZTTTT*

Oh my this must be important, better go answer.

——————-

"WHY AREN'T YOU ON ECHOLINK SO WE CAN TALK ABOUT THE BIBLE!"

"[I know a washed out female singer from the 60's]"

——————-

Some of the Silver Linings to this is,

I got into the Bible.

I just stick around though to wait till he gets vanned.

No.1104

>>1098

holy shit, that's nuts.

The closet I got is an old dude in a nursing home. cool guy, rambles a lot but never heard anything terribly crazy or odd about him. just that he was old as hell (sounds like 80s/90s).

File: 1449251026045.jpg (84.96 KB, 471x600, 157:200, shy_dog_by_cajophora.jpg)

I can't do it! I got my ham ticket. I got my HT. I have a club nearby and they run a net (fat old dudes who put the ham in ham radio).

But I can't speak! I just go real shy. Calling CQ is like freaking me out.

What do? I would prefer HF and try talking to people miles away, but the \$ of a rig hold me back.

7 posts omitted. Click reply to view.

No.1034

A "I don't go on air because it's full of fucking retards" whinge.

Last Sunday there was a big Antenna lecture extravaganza about 100 miles away that I'd waited a month to go to, but a few days ago the starter motor in my motorbike exploded. Bugger.

So, I turned on the radio to listen to the local VHF repeater to see if anyone else had plans to attend, so I could beg a lift from them… Instead, I got:

VK2FourWheelDriveOwner: MAHSMARTHPONE!

[30 minutes later]

VK2FourWheelDriveOwner: <…> I'm 20 minutes from my driveway

[later]

VK2FourWheelDriveOwner: I can Echolink from my smartphone

[later]

VK2FourWheelDriveOwner: I'm going through …. <never copied because the retard spent 5 solid minutes to give half a sentence in his Over, repeating himself about 60 times>

[later]

VK2FourWheelDriveOwner: I wants to buy a new smartphone this one don't werk

[later]

VK2FourWheelDriveOwner: cekewcekewcekew <blah> Listening

No fucking way I was going to risk spending ~5 hours in a 4WD with that vegetable if he replied to my request. I stayed home.

No.1053

You could use a Text-to-speech program.

If anyone asks why you use it, just tell them that you are very shy about your voice.

No.1054

>>579

>Just say hi. Nothing bad is gonna happen.

Fuck you, Anon. I tried that, and…

…a guy breakered and bitched about someone playing 'silly buggers with the repeater'

…and got into a ragchew with the guy who had attempted to do the QSO with me.

…that went on for about 30 minutes

No.1075

Fucking hell, pls let this be a joke.

No.1097

>>1053

>If anyone asks why you use it, just tell them that you are very shy about your voice.

>not telling everyone that asks that you're a robot

File: 891a5a783ef1fab⋯.jpg (104.87 KB, 1080x608, 135:76, y.jpg)

The Yaesu FT-818

The 8Chan hivemind is sighing at Vertex putting any effort into making a QRP radio for the 21st Century, correct?

- pissweak NiMH internal battery

- no SDRness,

- no 'easy' DSP features like software roofing, instead /still/ requiring that expensive Collins mechanical filter bullshit.

- no USB, either for CAT, or recharging.

I /get/ the belief that superhet radios are Real Radios, but chuck that into the extra-enthusiast market, not as the mainline products of CURRENTYEAR.

No.1059

I'm stoked for the qrp-labs QSX kit. 150usd for a all band, all mode 10W rig with a case as a kit. SDR guts with well designed analog frontend.

No.1060

File: 8e2f74b062de3ca⋯.png (32.68 KB, 664x355, 664:355, qcx-shipping.png)

>>1059

It'll be interesting to see. I have a friend who wants to be the first kid on the block with one, so I'll see what he ends up getting. Hopefully it won't have the IMD problems the uBITX has..

I've got a QCX on order. Goddamn Turkey, since when??

No.1062

>>1060

Since Qrp-Labs stopped shipping from Japan.

And regarding QSX, it's a more involved build than uBITX. So I'äd suggest uBITX to someone new to homebrewing.

I have skimmed the construction manual for 40m QSX, as it was the kit build at the 2018 South-African YOTA (I was not there, but I know people who ware).

So there are some of those kits built an on the air. But those are mono band prototype series.

The QSX 10W PA is also available as a separate kit from Qrp-Labs, so I have that coming in.

But i fully expect the QSX to be an excellent rig, if they have not fucked up the software.

Early M0NKA mcHF software had shot dynamic range, a more talented dude did some fixes and casually pulled something like 50dB more dynamic range from the design with software fixes only. QSX has a related MCU to the mcHF so potential for the same capabilities.

No.1093

>>1038

Usb sucks way more than rj45.

The usb connector was made for a shitty keyboard or mouse you’ll plug in twice. It’s rated for hundreds of insertions. This is still true today even in light of things like thumb drives.

Today the biggest factor in how durable a usb plug is is “when will Verizon send me my next phone?”

Usb connectors are shite for mobile use and unlike serial when there is a tiny dropout, your OS closes file handles and forgets all about the device. When this happens in rs232 you lose a byte or two.

No.1095

File: ed1206910766db6⋯.png (165.72 KB, 352x284, 88:71, why-doesnt-my-t1-look-like….png)

>>1062

>it's a more involved build than uBITX

I found it not a bad build project.. although it took me like 7-8 attempts to wind that fucking T1 toroid.

File: 8251a8ce5a10682⋯.png (302.66 KB, 416x363, 416:363, AlphaVirgin.png)

Hi there, gonna study up and take HAM test soon but, how do you figure out what to buy first to get started ? seems like there's so many different radios and stuff over whelmed,,,

No.1074

>>1044

1) Buy a second-hand transceiver. Go to a club meeting and ask around

2) Buy a baofeng UV-5R or baofeng UV-82 and use a repeater

73

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