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If it ain't ear piercingly loud with some distortion on par with grunge metal, then the "tune" just ain't good enough, lmao. I CAN STILL UNDERSTAND YOU, TURN THE MIC GAIN ALL THE WAY UP & CLIP D11! 4-10? The squarewave really helps you to get an honest & accurate power measurement, lmao. I...

I like using an old toothbrush! The anti-static foam is a great recommendation, now how to keep cotton strands from clinging to components, lol.

Completely understandable, and that raises a good point! I used my air compressor the other day to clean my P.C. w/ low PSI (I hadn't drained the tank, no line filter) and I noticed some water was coming out, not good! Use a line filter to trap moisture if you decide you have to use your...

I used to use cans of compressed air to remove stubborn dust from in between heatsink fins of the CPU cooler. That's the only way to do that without removing the heatsink to manually clean in between each fin. I've never had static (from air turbulence) kill a motherboard. I little bit of air...

"The only way to clean a 2000, just gotta douche it out"

Depending on how long the smoker had the radio, and especially if they smoked indoors, the inside of the radio may need a thorough cleaning as well, to really remove the smell. I used to use "Formula 409" for old computer cases, that would get the yellow nicotine stains out, then we would...

Waiting for my debut on soundcloud to go viral, lol.

The fun part is when they get it back and the "watts ain't right"... *YOU $%#@! MY RADIO WAS SWINGING 30 WATTS PLUS, YOU BROKE IT* Just kidding, but the scenario has played through my mind. I call it cognitive dissonance... it is what it is.

Klint, Mike raised some good points. :cool: You can operate the radio itself on 12 Volts flat and that'll reduce the power with most all CB sets. If the 47 Ohm resistor doesn't lower the dead key enough, and you don't feel like removing it, maybe remove D8 instead and use (2X) 1N4001...

Welcome to the forum Klint! When you remove or repurpose a channel 9 switch you need to make sure that any and all connections made by the switch in the "normal" position are still going to be made after you remove the switch. If you find three wires, five wires (or more) it really doesn't...

If the repair cost $45... and I can sell my Cobra 25 LTD for maybe $45... and The cost of a new Cobra 25 LTD is like $90.... How does the "resale" value of a radio affect the cost of a new one? Now if you mean to say "If the repair cost exceeds the cost of a new radio, then it makes sense to...

Maybe relay(s), dried cap in the keying circuit, blown "keyup" Transistor? I guess it could be anything after all, I can't suggest a specific spot to look at, he could look around for anything that may have let the magic smoke out.

Okay I've reviewed the schematics, all three radios (Cobra 25 LTD, Cobra 21 LTD/GTL) have virtually identical output sections, so the EKL mod sheet should be all you need. https://www.worldwidedx.com/threads/40-45-watt-erf2030-mod-for-cobra-25-uniden-66-68.33400/ Have fun, and watch out for...

D.R. Howell, I would grab the schematic for the Cobra 21 LTD/GTL (whichever model you've got) and the schematic for the Cobra 25 LTD Classic. Then grab the EKL Mod sheet for the 25. Now compare the circuits and mod away using the EKL paper as a reference, of course some values will not be...

510 will work, but the 520 is my first choice between the two. Many Ham articles can be found using IRF510's for RF output, with a little adjusting of the circuit values the 520 will work and provide more headroom. (anecdotal so take this with a grain of salt.) OEM FQP13n10 seem to spank the...

I thought that part number was for displays that work in the Cobra 25/ PC-68 style radios. I forget if it is commom cathode or common anode. I've bought a few of the blue workman display LED's for Cobra 25 LTD radios, I think with that same part number, but it's been a while and I forget.. It...

If President asked where the "service shop" is located, then saying "In a camper down by the Rio Grande" may not be what they want to hear. I don't repair radios for money, but I do work on some radios for local friends who talk on our home channel. You see RPC, I may not be a "CB radio tech"...

You seem to know all about the con artists out there, how did you forget that soom fools try to mod SMT radios with through hole parts? Does that black goop ring any bells? You and your buddy are so keen on "exposing" people, but honestly you failed to differentiate yourself from a "drugged up...

I've got to ask, why say anything besides "for servicing the unit" when asked? Or is that all you told them?