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I see a pair of UA741 OP amp chips. That leads me to believe it is probably a mic compressor or preamp. Tracing back all the connecting leads will tell the full story. For rigs back then that didn’t have that function, various compressor add-ons became popular. Usually connective wires to bypass...

This is my enhanced version of the Utac TRX-500. Many horizontal lines were redrawn and the LED and PLL section was completely redrawn for sake of clarity.

Enhanced version of CB-19 Demco Deluxe service manual with separate schematics.

Thinking about making your own? I’d try Zazzle. They have a number of different designs at reasonable prices. Midlands C.W. McCall’s logo among others comes to mind. https://www.zazzle.com/create_your_own_add_image_custom_text_round_clock-256187880550476176

I was surprised to see that Pace thought it was necessary to apply a fan in that rig. Enhanced version of the service manual with separate schematic.

This brings back fond memories 22 years ago with Venus Hum and the Blue Man Group on tour. She is one of the best cover artists IMO.

No, both have similar parts, but not the same board.

Couple that POS with a QRP rig for an ultimate challenge. LOL

You might try something like these LED dome lights. I suspect they would be too bright. Adding some series resistance to each of them would solve that issue. Finding the ideal resistance value will take a little experimentation. I usually start high like 15K, then I work my way down from there...

Thanks for posting your thread! I once added a few small (half the size of a pencil eraser) capsules salvaged from several defunct Chinese walkies. Those were gold plated, including the short leads. I figured since they were gold plated, they had to be of higher quality than normal. I was very...

I wanted to pass along this deal to others that may want a quality dynamic replacement mic. In the past I have purchased the Uniden BC645 electret condenser mics. This two pack of so called “walkie speaker mics” contain 500 ohm dynamic cartridges, not the same as the original BC645. They are pre...

One of the best iconic musical scores ever IMO. Wow! That’s a very large orchestra. I wonder how much money each participant is being paid. No doubt not enough….

Shortly after the 352 hit the market I received one for free. Not from the factory, but from a disgruntled wife of a CB’er. It seems he was spending too much of his life on the CB instead of paying attention to her needs. During a heated argument she slammed the radio against the wall. The...

This is J8KE, the so called shedder guitarist that occasionally played with the Graystones. One more time, into the wee hours I go…….

I was up half the night listening to these kids videos. The bass player is my favorite.

Thanks!

I’m in the final process of enhancing the Johnson Messenger 223 service manual with spliced schematic (Sam’s 23). I need to know the value of resistor R28 so I can redraw that part. Later I’ll post my enhancements upon completion.

Mildly Enhanced version of the 78-999 service manual with separate stitched schematic.

Enhanced version of the Courier Royal.

Enhanced version of the Ray-Tel TWR-4