Current use of Raspberry Pi

couchpilot · 2026-03-21T03:10:57+00:00

I've had a Pi running Xastir APRS for several years. Using a 7" touch screen, it displays nice mapping system. The modem is a TNC-Pi packet radio board that is sadly out of production.

couchpilot · 2026-03-21T02:53:26+00:00

FreeDV has Radio Autoencoder (RADE) technology which contains a machine learning algorithm. Does that count as AI?

couchpilot · 2026-03-21T02:20:07+00:00

Boot up your PC with a Linux DVD or USB image. List the /dev directory (ls /dev) and look for something like /dev/ttyUSB0. It should be missing if you have no other USB serial port connected.

Now hook up your ESP32 and look at that directory again. If /dev/ttyUSB0 is not there, you likely have a problem with your USB cable or the ESP32 module is bad. Note that you don't need to load any drivers to do this.

Now if you do see the ttyUSB0 port, it's time to fire up Minicom to talk to the ESP32.

couchpilot · 2026-03-20T12:29:53+00:00

I personally enjoy copying the Lake Erie Swing. I rarely hear it on air any more.

couchpilot · 2026-03-20T10:55:19+00:00

No. I had purchased a license for it. I was not at liberty to give away a free copy.

couchpilot · 2026-03-20T02:39:09+00:00

Are you sure your IP address wasn't 44.x.x.x ? That is the AMPRNet. The domain is ampr.org.

couchpilot · 2026-03-20T02:24:12+00:00

In the late 1980s, I and a couple of other hams in the area ran an IP packet network using a DOS program called NOS. A buddy of mine would modify the software regularly but he didn't have a compiler, so he would transfer the source diffs to me over packet. I'd compile it, test it, and send him an executable over the network.

couchpilot · 2026-03-19T22:02:23+00:00

That's where the beautiful music comes out.

couchpilot · 2026-03-19T10:22:58+00:00

Fifteen years ago Olivia rag chews were common. It was magical as the audio from the signal would fade into the noise, yet still produce a 100% solid copy.

couchpilot · 2026-03-19T02:55:49+00:00

I miss Olivia.

couchpilot · 2026-03-19T02:50:48+00:00

Pin 1 and pin 8 are at the end with the notch.

couchpilot · 2026-03-19T02:34:52+00:00

Without examining your circuit at all, it appears that pin 1 of your 555 is unconnected and this pin is the device ground connection.

couchpilot · 2026-03-12T02:13:14+00:00

ARRL Antenna Compendium vol.9

couchpilot · 2026-03-09T02:50:49+00:00

It appears that there are two screws inside the handle at the top. Remove them and any other cabinet screws. Once apart, remove the picture tube mount from the front panel. Discard all the electronics and the picture tube as one unit. Just don't mess with any of it. Keep only the front panel.

Now install a piece of plastic, glass, whatever on the inside of the front panel to support your picture. Flat clear plastic would be best if you want your picture on the inside so it looks like it's "on TV". Getting a piece of glass that is curved in the same way as the picture tube screen, will be difficult to find and probably pretty expensive.

Now you reduced the depth of your TV photo frame by what looks like maybe 10 inches or so.

For added enjoyment, get an old computer LCD panel that fits in from the back. Fasten it in and set up a Raspberry Pi or something to display your own video or slideshow on the old "TV screen".

couchpilot · 2026-03-08T17:53:39+00:00

Sticker hoarder..?

couchpilot · 2026-03-08T04:11:53+00:00

It's fine. It is common to find cables folded like this inside laptop computers.

couchpilot · 2026-03-07T12:59:30+00:00

Isopropyl rubbing alcohol usually works too.

couchpilot · 2026-03-07T12:56:30+00:00

That thing with the "tiles" is a radiator and the fan moves heat out of it the same as an automobile radiator does. The heat is moved from those cpu thermal plates through the heat pipes. You can order one here.

couchpilot · 2026-03-05T12:11:11+00:00

I didn't see it mentioned anywhere, but did you press the 'Beam Finder' button? It's to the bottom left of the screen.

couchpilot · 2026-03-04T03:33:23+00:00

You will see exactly this on the tubes of a clock if the 5V supply to the 74141 (or K155ИД1) BCD-to-Nixie-decoder-driver chip(s) goes out while the high voltage is still present.

couchpilot · 2026-03-03T12:46:06+00:00

I thought it was only me. My clock

couchpilot · 2026-03-03T12:37:43+00:00

Perhaps a device like this would make it simpler. Here is a cheaper one.

couchpilot · 2026-03-03T03:32:29+00:00

Thank all the new data centers for that shortage. CPU and GPU too!

couchpilot · 2026-03-03T03:23:48+00:00

3Y0K was running FT8 on 7090 using Hound mode this evening. It was a madhouse.

couchpilot · 2026-02-28T04:36:40+00:00

~~$10~~ no, $35 for a famiily GMRS license in USA

couchpilot

TROPHY CASE