I got this CB VFO at a hamfest for $2. Perfect case for a DDS VFO..
First thing was to gut it and save all the bits, especially the gear drive knob and the nice air variable cap.
Now that it’s empty time to pick a new display. I really like the plain LED’s
I had to get rid of the screw post DC input terminals
I put a coaxial power jack in the top hole and a ground screw in the bottom one. Even the original legends are useful…
Probably will ditch the 110V input altogether.
these uneven tripod feet had to go…..
I 3D printed a bezel for the LED’s to match the style of the original display.
I reused the three original holes from the knob and added two more at opposite ends of the display.
I’ll use a rotary encoder for the knob so no gearbox needed. I’m tempted to print a phony one to keep the look..
Not a bad start to this one…..
I picked up this nice condition Ham transmitter last weekend.
It should go nicely with my Heathkit receiver..
I’m amazed at its condition. Except for the yellowed meter face it’s really clean and unmolested inside.
Almost too nice to cut up but those caps should probably go before I try to power it up……
A few years go I made a Cantenna Dummy load. I filled it with mineral oil left over from some woodworking projects and it;s worked great for a long time. Takes a 200W or more just to get it warm…
I decided to 3D print a mount for a wattmeter on top… Had to make a base while I was at it…
And I made an RF power meter tap too….
Now to decide if I go Analog or TFT Display digital…. Or maybe a combo…. I do have some nice meters I got recently at a surplus store….
I saw this on instructables and had to try it… Luckily there are plenty of Nerf guns in this house….
I had a sensor amplifier board on the bench from a motorcycle Dyno project so I figured I could just use it with an IR Led/Detector too.
It was designed for these VR automotive speed sensors…
Theres even a smaller standalone amp instead of the shield. Ultimately I’d like to build it into a barrel extension…
pick one of these…
add a 3D printed muzzle break….
and it works great….
and even the serial logging. Time to make that bluetooth to a custom Android app….
After reading some horror stories about cracked tubes I added a Dallas 18B20 temp sensor to the water supply.
I have a bunch of Peltier chips and heatsinks and a small pc cooing radiator but so far the temp hasn’t come near 70 and its been a really hot summer. I don’t know if I’m going to need any supplemental cooling.