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The video does, but the one in the old Cobra 29 shouldn't, it has an RF sniffer with a 5pf cap sampling RF output on TX, to "turn on" TR23 that turns on the Mod lamp. Modulation positive peaks increase the voltage feeding the mod lamp, thereby brightening it. No RF, no light.

The old 29 - 23 Channel radio had the Mod light, the 29GTL and 29LTD and newer did not. It would be an easy mod to add a Mod light circuit to any radio. Just would need to figure where to mount the light. Parallel with the Meter light? Or change from bulb to LED??

HR2510/Lincoln/HR2600 President Jackson, maybe others

Me thinks maybe Weather Band optional.

https://fccid.io/AMWUT434/Internal-Photos/Internal-Photos-5668595

You forgot to put the Emitter voltage in your original post. What are you getting there? Broken trace at R7 (22) or Emitter of Q1 (2SC710)? Sounds like the Emitter is not being pulled down, and the Base is "following" this voltage trend. If Q1 were testing bad, you could substitute a...

When you change the jumper length, that changes the phase between the Final and the amp. This sometimes causes the amp (and Final) to go into self oscillation. Sometimes simple things like jumper length can make or break a system.

Change jumper length between radio and amplifier.

And O'Scope patterns, Spectrum Analyzer shots, meter readings!

Nomad don't usually get on until late night.

I rigged up a PNP switching transistor on the solder side of my 1st Gen 2970, I think I used the R.Beep logic from the CPU up front, rerouting the signal to this PNP transistor. The Emitter leg goes to the +8v TX line on the board, where the Brown and Black wires go to that key the amp. The...

The Madison had a fixed 1.5k resistor there, too, I changed them out for a 500 Ohm pot and a 1N4148 to match the C148/2000 configuration. And any other single or double conversion MB8719 chassis (Radio Shack, Teabury etc...) that came across my bench. Also, while you are at it, I came up with...

https://cbtricks.org/radios/cherokee/nr150/index.htm I looked at the schematics, the Channel Selector is a rotary Up/Dn encoder like on these newer CPU driven radios. The Epoxy encapsulated CPU/PLL board is most likely the same or similar to an earlier Cherokee CB radio, the CBS2100, which has...

Some schematics for Galaxy et al... with the same generation boards show 2002 as the part number. It is a (double) center tapped 455kc IF transformer. Secondary looks either unused (in this case, no traces), or maybe nonexistent? If you have a junk Galaxy/Mirage/Connex/ et cetera radio, they...

I put a 1k to 2.2k in parallel with C71 so it releases faster, then readjust the AMC with an O'scope. Lower is faster release.

Check Pin 13 of the PLL, this adds or subtracts .08 to/from the frequency it should be on. Make a PLL cheat sheet.

A long time ago, in a far, away place from here (Tampa), I used to work for NeoComm Electronics in Newton Falls, Ohio (Zipcode 44444). A customer had a Cobra 1000GTL and a Glen 326-G VFO, and wanted me to install it to run the radio. I perf-boarded a 10.695 oscillator, because it was a one-off...

What would generate the 16.xx signal? How would it be controlled? There are a few videos on YouTube where someone used an Arduino driving an Si5351 and an OLED display to show frequency. Bypassing the PLL and VCO.

Green refers to the signal coming from the main 10.240 oscillator, but in your case, you are generating a secondary 10.240, so no need. All other parts of this (JP15 and R69) remain, if using an "S" kit or clone.

Smallest Oscillator Injector kit You will ever see, Rev 1. I goofed on the copper trace naming of the Uniden radio, should've been 76XL not 76LTD (which would be the Cobra 29LTD). But, it is diode switched, MicroMELF sized diodes. Hand soldered, not oven. I hadn't cleaned the flux off of...