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One hell of a deal... I bought one of those JC Penney 6247 radios years ago, but I swore I have to yell into the mic before any decent modulation came out of them. Curious if all 4 of your 148 GTL radios are around the same years or various ones.

I got a chance to say hi to UDX-483 a few hours ago on 37 LSB. Conditions are good.

On my old Galaxy DX99V, it sounds exactly like your radio when you have talkback on and transmit on SSB. You are doing well with that radio.

soldered the wire back, and with it on low, it has 50 ohms, and with it switched on, it zeros out as a direct short. hooked up the leads of the volt meter to each leg off the switch.

The switch itself is showing a short when its flipped upwards, but the other switches are acting the same way.

Unsure if its related, but maybe the voltage regulator is giving it grief? Cobra 140/142 GTL service bulletin

The through holes are plated on the other side. That part was removed when I did attempt the SSB Biasing circuitry. I soldered it back but just above where it makes a connection. I thought it was a resistor since it had the color bands on it. But the colors were different than regulator...

This is how it is now. I did desolder it temporarily so it didnt get accidentally switched on. in the process of removing the board from the heatsink.

The amp was on Hi when it let out the smoke, but this was when I tried to add the whole SSB Bias circuitry to it earlier this year. I removed that all out, but it still gets that 47 ohm resistor hot.

I have a couple, but currently an old 140 GTL radio and have the AM carrier set at just under 2 watts. The moment you even try it on the Hi setting, it will skyrocket the amperage 30+ when you key up instantly. Of course I let go so it turns back off.

Allright......New development... Kept the amp on the low switch, and now its working?! But you can't go on the high side, as thats when things go south and the amperage draw sky rockets passed 30+ amps. Least this time the relay didnt fully stick on and cook something. Even if I gotta keep...

Those pictures help. Thanks. :)

I have an older icom radio that I could probably keep on to at least monitor. Will have to dig it out of the garage. :) Appreciate the information.

Thank you. :)

Ugh.... Ive said it earlier this year and probably will... I NEED to get a 6m dipole up lol.. I am still not familiar with or where to listen on 6m or where one can talk simplex etc... I know it goes from 50mhz to 54mhz I believe, but not sure where to go.

Oops, Here is the picture of the other side.... Thanks for your input Nomad. Your advice is greatly appreciated all of these years. If this amp is a lost cause then no worries. Just was hoping to bring it back from the dead... :)

Hard to take a picture, but for sure no short against ground.

I removed the failed SSB Bias parts lol.... I put back stuff to the way it was, but it still burned up the resistors you see in the picture... The second it seen any power, it instantly cooks the resistor. It was on my trusty 146 GTL radio which does around 10 watts SSB max on peak modulation...

Hello, Its been awhile since I messed with this amp. I did my best to add SSB Biasing, and thats when it took a dive and burned up on me. (The two resistors next to eachother were to make up for the burned up resistor I didn't have), and it still cooks the resistor when you transmit. Basically...

Me being a youngster (in a sense, I am 39 now..), I was first exposed to this song through Ugly Kid Joe's album.....