/hamradio/ - Electronics

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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.

>>1111 (reluctantly checked)

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

but why do they retire working hardware?

>>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.

>>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.

>>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.

>>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.

>>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..)

>>1135

What does one call that ride?

The duke of health hazard?

Anyone try out cnranger?

>>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.

>>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.

>>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.

>>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.

>>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.

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.

IMO start with 2 UV-5r and programming cable.

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.

https://github.com/gnuradio/gnuradio/tree/master/gr-digital/examples/packet

>>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.

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..

>>835

>pskmail

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

https://www.youtube.com/embed/99H6z5rmvco

>>627

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

>>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.

>>1118

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

>what are you going to do via shortwave?

Shitpost like I've never shitposted before.

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

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?

>>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.

>>1092

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

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.

>>631

I go on 27.025 and I just hear weird beeps

>>558

What a bunch of faggots.

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

>>635

THE NUMBERS

>>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.

>>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).

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: I can'ts upload to youtubes from my smartphones

VK2AdvancedRetiree: Use a computer.

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.

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.

>>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

Fucking hell, pls let this be a joke.

>>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

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.

>>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.

>>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.

>>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

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