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I used to go to Chester's other store in Largo, Florida, before they closed it down. I bought a lot of stuff from there. One of the guys there was Len from AES Clearwater, before they closed that too. He retired after Chester's.

I used to remove and repair faceplate potentiometers, singles and dual pots, even switched (Power or other function) ones. I used to take notes as to which wire goes to which terminal, (before phone cameras), desolder them from circuit. They have mounting "ears" that need to be carefully bent...

Most likely culprit is C117 next to L3 is shorted. But, can be any of the other red circled items, too, these are either tied directly to, or low resistance to the PTT line of the Mic socket. last time I helped someone with a Cobra 29 a few months ago, that had TX all the time, it turned out...

I use Eagle CAD and have my boards made by SeedStudio in ShenZhen, by Hong Kong.

You can hear the Over-Fuzz-dulation on audio peaks, there is no fold back (mod-limiter) to smooth it back to sinewave audio. And adding reverb to the audio makes it even more fuzzy.

Leap Frog made his 10.695 oscillator on perfboard. I did similar (perfboard) to a Cobra 1000GTL in/around 1984 for a customer who wanted a Glen 326G VFO installed https://www.cbtricks.com/miscellaneous/vco/glen/index.htm . I put the Glen on the CB/PA switch, when in CB mode, the regular PLL...

Bob, the schematic for your "A" kit will work, just change the crystal frequency.

Hmmm, no 'Scope pattern in the video.

Other People's Money. Like a Ponzi Scheme.

The premise is that the Pre-Driver power feed jumper (JP32) is removed, and a diode samples the positive going TX audio voltage, the added electrolytic capacitor (negative side grounded to the can of L17), this stores the TX voltage, it "idles" at 12v (from the transformer and blocking diode)...

It is a receive device only. You can receive off of a coat hanger wire as easy as anything else, especially when the target object is near enough. So the antennas provided would/should be fine from 24-1766 MHz. You do not have VSWR issues unless the antenna(s) are being transmitted from.

JP32 works too, it comes off of the secondary trace that JP29 feeds. I used to replace JP32 with my adjustable low carrier audio fed high swing mod.

+8v TX on a Cobra 29 GTL/LTD/Classic even the new LX Same board layout. Component side Solder Side Red trace is from the Collector of TR21 (TX Sw.) Any place along that trace (solder side) or...

If it is unlocked, and done correctly, then where you talk is where you hear. Just like a VFO in a Ham Radio. Having a "Locked" Clarifier/Voice Lock/RIT control (Receive only), then your transmit is "locked" to the internal control, not the external on the faceplate control. What about drifty...

This is a just over 10 years ago thread. The guy hasn't been on here since July 25, 2012.

Was it soldered on the other side, though?

I callz that Fuggly. Eww. Shoddy looking.

But, but, but, it has Schottky diode upgrades!! LOL.

I haven't had it hooked up in over 15 years, so I really don't remember. I also was experimenting on it for MOSFET, but have sidelined it having moved twice since then. I mounted the Galaxy Viagra A Blue Dot board on the side behind the mic socket. I mounted the U channel heatsink external to...

On the Cobra 29 (GTL/LTD etc...) you would pull C94. This comes from the 5.12 MHz output of the PLL, before it goes to the tripler coil L22.