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turbo rad
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Aug 26, 2021 20:24
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Achmed Jones posted:lmao i got my game gear today and the tv tuner a few days ago When I was a wee lad in the Ozark Mountains at the tail end of the 20th century, I heard about this magical device called a Game Gear and it BLEW MY loving MIND that you could watch OTA TV with a hand held. The irony that I'm sending this message on a smartphone while on the toilet is not lost on me.
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Aug 27, 2021 01:37
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it worked great too for all about 12 minutes you could get off 6 AA batts hope you had a dad who worked at fuckin duracell
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Aug 27, 2021 06:00
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My wife found a Philco 40-165 at a thrift store today for $130. She liked the style and she sent me photos. It's shortwave capable and can also listen in on 160, 80, and 40 meters, so what the hell, told her to buy it and I'm gonna learn about restoring a radio that's only a few years younger than my grandmother!
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Aug 29, 2021 02:33
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ooooh. big old art deco ish setup. nice. * ALMOST GUARANTEED TO NEED REPLACEMENT: filter and any paper capacitors. * FLIP A COIN - MAYBE GOOD MAYBE NOT: tubes, esp the rectifier and audio amp * PRAY ITS GOOD: speaker * TAKE A LOOK AND SEE: power cord. probably frayed good luck and keep us posted. love the big tanks, i bet it'll sound great
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Aug 29, 2021 17:29
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I'm far from an expert but I'm writing everything off. Gonna strip every cap, wire and tube out of this bitch and see if I can get her to power up.
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Aug 30, 2021 00:53
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mycomancy posted:I'm far from an expert but I'm writing everything off. Gonna strip every cap, wire and tube out of this bitch and see if I can get her to power up. well if you do that it won't work at all!!!
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Aug 30, 2021 07:44
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what's a good place to order an fm antenna from that isn't amazon? just need a 75 ohm antenna that'll plug into the back of a sony str-dh800 receiver
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Aug 30, 2021 20:20
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id probably use ebay for that sort of thing. or just shove a wire into it and see what happens. kinda depends on what the connector is, fm loop antennas arent too hard to find so long as the connector is reasonable
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Aug 30, 2021 21:03
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Farmer Crack-rear end posted:what's a good place to order an fm antenna from that isn't amazon? just need a 75 ohm antenna that'll plug into the back of a sony str-dh800 receiver I mean you can go to best buy if you feel like paying 2-3x premium over amazon for the same thing
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Aug 30, 2021 22:05
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just a little internal T wire dipole or some sort of outdoor/"good" antenna? idk ebay probably has a thousand of the former
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Aug 30, 2021 22:07
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i'll do ebay then. thanks!
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Aug 30, 2021 22:49
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are there any crucial ham apps for iPads?
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Aug 31, 2021 05:05
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Achmed Jones posted:are there any crucial ham apps for iPads? simply turn off your ipad
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Aug 31, 2021 05:09
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Achmed Jones posted:are there any crucial ham apps for iPads? i saw this mentioned in the arrl magazine but haven't used it yet: https://www.hamrs.app/ also, for anyone that uses sdrsharp this guide was just updated: https://airspy.com/downloads/SDRSharp_The_Guide_v3.0_ENG.pdf
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Aug 31, 2021 14:22
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pretend this post is in yospos style, i am lazyquote:
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Sep 2, 2021 10:31
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European Goons
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the DMR nets are fun and i try to make them. thats actually a great time for me, i will show up and shoot my pistols in the air and hoot yosemite sam style
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Sep 2, 2021 16:15
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my radio rebroadcast thing is working great, but it's also very splattery: lots of bleed onto frequencies that i dont want. passive bandpass filters are easy to create. the problem is that whatever i use to connect the gpio pin and the bandpass filter itself will radiate, 'cause a little jumper wire is enough to send the signal out perfectly. so, then, i need some shielded jumper wire i guess to make sure that i'm not radiating from wire between my gpio pin. is my best bet to just make a little shielded box to sit on top of the pi with an input wire and an output antenna sticking out and then minimize the length of jumper between the two? i can probably get the length of jumper pretty small if i do that, but it'd be great to shield the connection itself, too. i can't put the whole thing in a faraday cage because it needs to be able to get wifi (i don't have any clue how i'd connect an exernal antenna to a pi-zero and absolutely don't want to mess with a usb wifi adapter) i'll probably end up buying a pi-zero-w without a gpio header and just soldering the single wire in directly to the appropriate gpio pin (and ground) for the final project so i'll have a little bit of space to play with a caging solution, but i really feel like a shielded wire is my best bet if such a thing exists
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Sep 5, 2021 00:53
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Hmm. Item 1: exactly how much splatter are we talkin' about? Are you seeing it over like a mhz or two, or like a 40 mhz range? I ask because, well, high "Q" - read: sharp - filters are quite intricate and finicky to tune. For some context I have a 2 meter bandpass cavity filter and it's about 12"x4"x6" and is still only tight enough to pass a 10 MHz range. In addition, it's hard to say what the output impedance of your GPIO pin is - and filters work best with known input/output impedances that they are then designed for. That being said, what I would do: * Find a suitable GPIO pin that is directly next to a ground pin. * Buy a short SMA female to <whatever> cable. Make sure the SMA female has a flange and a nut so you can chassis mount it. The other end doesn't matter, because - * you're going to cut the far end off, and _carefully_ (this micro coax is super fragile) strip the last 1/4", separate the shield and center, tin both leads and then - * solder them directly to the pads for the ground and GPIO pin you've picked. Keep in mind that there's always going to be trace length between the GPIO pin out on the chip and the actual header, so this may not even be worth it. God, I wish Ramsey was still around because the FM10 was $40 and the perfect thing for your application - and actually had good stability and filtering. it was also low power enough that unless you hooked it to a big rear end outdoor antenna you wouldn't get any FCC knocks.  Sadly the "Part 15 Compliant" FM transmitter market is just completely dead outside of the cigarette lighter adapters that you can use to transmit phone audio to a FM car stereo. edit: Which....ok, look. depending on how much you want to keep this a 'pure raspberry pi only' project or not, might be worth considering. Get a line out from the Pi, get one of those little car FM transmitters, hardwire the audio in, and get a 5v -> 12v boost converter on a tiny PCB to feed power. Jonny 290 fucked around with this message at 01:17 on Sep 5, 2021 |
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Sep 5, 2021 01:14
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oh yeah we're talking, like, 6-10mhz on either side. it might be that a band pass that i could rig up wouldn't do the needful in the first place. that fm10 looks rad - i'll keep an eye out on goodwill, ebay, etc for an fm10 kit (right now there's one on ebay for $90, but that's too much for me) thanks for the tip re: the sma lead! I'll look further into getting that set up. I considered the same thing with the car lighter adapters, but all the stuff i found was pretty big and clunky, which i'd like to avoid if i can
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Sep 5, 2021 01:56
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Yeah, understood. Keep in mind that any of those $10 ones you find on ebay are likely 90% airspace with one or maybe two PCBs. Rip that sumbitch apart and hot glue it in a box and start soldering up fly leads
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Sep 5, 2021 02:13
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oh nice, that might make things easier! i just had a look at boost converter circuits, and cause of the fast switching thing i'd probably buy over build; is there any realistic chance that a transmitter would have a buck converter i could just yank out, or is it pretty much going to actually need 12v? e: oh yeah i was having trouble finding premade circuits through google, but i searched on ebay and they're everywhere and cheap a f Achmed Jones fucked around with this message at 02:39 on Sep 5, 2021 |
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Sep 5, 2021 02:37
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yeah every form of low current dc-dc converter is like $1.29 a board on all the markets, it's a super cheap tech now.
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Sep 5, 2021 03:12
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 street found this today. even if it doesnt work its gorgeous
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Sep 5, 2021 03:15
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you should probably return it to fred
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Sep 5, 2021 18:36
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fred's dead, baby. fred's dead
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Sep 5, 2021 18:37
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holy poo poo that is a rad looking radio
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Sep 5, 2021 19:36
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late sixties through early seventies radios were the coolest. Here's a quick run through some of the heavy hitters of the Cold War era. http://www.w8zr.net/vintage/receivers/index.htm
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Sep 5, 2021 19:38
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c radio s: got my rebroadcaster code ported to golang rather than ruby. it runs quite well on the raspberry pi zero. it's not quite feature-complete yet (it doesn't actually write its state to the state file) but that's trivial to implement. i've spent the last few days tracking down a bug that was leading to duplicate processes being spawned i had a goroutine that runs the play-the-stream command and then blocks until it exists. i was using cmd.Run() inside the goroutine. what happened was that in the time between the implicit cmd.Start and cmd.Wait(), the process's pid was still unset, so the reconciler and other code would think that we weren't broadcasting when we were. just needed to call cmd.Start() outside the goroutine (which blocks and sets pid when it returns) and then call cmd.Wait() in the goroutine. that blocks until complete, and after that i write to the "the command is terminated" channel and everything works it sucked bc it worked perfectly on my server - it was only on the much slower raspberry pi zero that the delta between Start and Wait was observable anyway that's done now. i also bit the bullet and moved the ui out of standard forms and into a js thing that just writes a blob of json state. it's basically a dumb little spa with no framework or anything like that beyond jquery and bootstrap lol. it works much better now.
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Sep 24, 2021 03:18
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Achmed Jones posted:c radio s: got my rebroadcaster code ported to golang rather than ruby. it runs quite well on the raspberry pi zero. it's not quite feature-complete yet (it doesn't actually write its state to the state file) but that's trivial to implement. i've spent the last few days tracking down a bug that was leading to duplicate processes being spawned Do you have this on a github/bitbucket or something? If you wanna share on the Discord instead of here, that is fine. But, it sounds like you need a mutex lock over what you're doing and possibly using context. What you're experiencing shouldn't be a thing, but glad to hear you got it working! Also, gently caress JS...
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Sep 24, 2021 03:34
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haha yeah i have mutexes for the state changing operations, that's why it was so fuckin confusing! the turnOn funcs were finishing and releasing their locks before the process had spawned and put the pid in the cmd struct it's not public on github yet, i probably won't release it until i have a full "build a raspberry pi image" pipeline set up
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Sep 24, 2021 03:40
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Achmed Jones posted:haha yeah i have mutexes for the state changing operations, that's why it was so fuckin confusing! the turnOn funcs were finishing and releasing their locks before the process had spawned and put the pid in the cmd struct Cool, let's shoot the poo poo on it on the discord for it then. Without seeing the code I can't really know why they would, but it's probably something that could be solved by using context.
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Sep 24, 2021 03:44
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i am stunned at how many contacts im seeing daily on 20 and 40 meter ft8; such a cool mode
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Oct 3, 2021 01:39
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come net with us, bellends. In precisely 3 hours time from this post. BM TG 3163563
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Oct 3, 2021 16:00
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thehustler posted:BM TG 3163563 what's that mean?
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Oct 3, 2021 16:13
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Hunter2 Thompson posted:what's that mean? brandmeister talkgroup that-number brandmeister is a dmr network - the big one, though there are others. talk groups are part of dmr - they're basically chat rooms that are isolated from the rest of the network in the sense that messages have a tg id. anyone with the number (or who sets their radio to promiscuous and the repeater happens to carry that tg) can participate
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Oct 3, 2021 16:26
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ah poo poo sorry I thought the details were more well-known than that. thanks for stepping in with the explanation
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Oct 3, 2021 16:50
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i've been meaning to get more into radio lately. i've had my general ticket for nearly 10 years but have done gently caress all with it. i bought the arrl extra study guide but i need some cool goals to get motivated
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Oct 3, 2021 17:38
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thanks for the explanation! I've never touched dmr, sounds neat though
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Oct 3, 2021 17:39
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| # ? May 20, 2024 08:57 |
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dmr is a pretty fun mode that lets you mix “real radio” with internet radio so everyone can play along and you dont need a huge mega station to participate. the downside is the laughably bad programming software but anyone in this forum would find amusing vs alarmingly difficult
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Oct 3, 2021 17:50
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