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I pulled the final out because it was bad. The base pad is about 0.2-0.3 volts. I don't recall if it was ok prior to smoking everything. Perhaps I just change out C152 anyways in case. I think I do remember the voltage there being high.

I unsoldered the wires that go in near the bias VRs (not the ground) . On the diode setting, the readings are around “612” on the driver and about 1200 On the final. I assume that 612 and 1200 are in millivolts. If that’s the case then both diodes are good. So then based on that and that the...

Ok so first update---- the final does appear to be bad after checking with the meter. After removing, the base foil pad appears to be ok. It is showing around 0.25 volts at the pad. I am going to check the bias diodes next. But so far, what does this suggest besides a possible bad solder joint...

thanks. I do have a good VOM meter so I can do it-just wanted to make sure I knew how but I can google it. . And I do have a scope too, though my scope expertise is limited.

Forgive me, how do I check it with the ohm meter? And when you say shorted, you mean the leads are shorted together or an internal short? and since my L39 is nice and black and smelled up the room, where do I get another one? Is there a reasonable substitute I can buy? No idea what the rating is...

Update. I replaced the voltage regulator because i didn’t have voltage at pin 5 where I should have had 13 volts into TR35. I could get 13v at the pad if I unsoldered the pin but not with it soldered. As soon as I turned back on , L39’started to burn up again so I think that is what popped the...

Update. I replaced the voltage regulator because i didn’t have voltage at pin 5 where I should have had 13 volts into TR35. I could get 13v at the pad if I unsoldered the pin but not with it soldered. As soon as I turned back on , L39’started to burn up again so I think that is what popped the...

burned up L39 while working on a no tx power issue. when it had that surge something else has happened. The radio will not transmit. When you key the mike, the receive light stays on and very bright. When I flip the CB PA switch to PA, the receive light stays on bright. When you key the mike...

Now back to my original and much larger problem. Have no TX power and I just burned up L39- again. Stuck because I have no idea where to get a replacement for it as I pilfered that one from an old radio. And of course even if I did have one, clearly something is causing it to burn up which I...

Bad solder joint. I was getting 13V at C172 and at a couple of places beyond that then it just stopped. Close examination of the board and I found a bad solder point. Crazy!

Burned one up due to an issue with that strip. Anyone have one (or more) they can part with or what would a proper substitute be? Don't know where else to find these and there’s no specs in the Sams Facts on what it is. Thanks.

now I just burned up L39 again. And when it had that surge something else has happened. The radio will not transmit. When you key the mike, the receive light stays on and very bright. When I flip the CB PA switch to PA, the receive light stays on bright. When you key the mike then, the...

All fixed thanks.

just to clarify, when I meant possibly “reversed” I meant D49 switched with D50. Would that possibly cause the no power issue ? And I tried to bias both the driver and final. I have not been able to properly do so. One cannot be tuned down enough and one cannot be set high enough which is why I...

. here is a question, I replaced the 2 bias diodes by pulling them out of another radio that I know was working properly when it was in operation. I am 99% sure I put them in properly when I moved them over. But on the outside chance I reversed them, would that cause the power problem or no?

all those coils seem to be peaked fine best I can tell. I know they were all operating fine before the power failure.

what about using a generic project PC board? I found one about the same size and maybe I can make the connections on that so I can mount it like the old one.

What’s dead bug style? Lol. That’s an idea if I can figure it out. I do have the Sam’s facts.

That would be great! Know anyone?

yeah tried that, no go. Just need to find a replacement....getting harder and harder to do.