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I keep going back to the growl and low mic occuring after replacing the finals. The growl is in rx and mic is low. I can't help but think the growl is oscillation in the PA section, possibly from biasing incorrectly. Also wondering what caused the old finals to death nap. Could also explain the...

Hi RF Krazy, I finished the truck, gotta take it in for an alignment at 8:30. I got the toe in/out set pretty close just eyeballing it, but the camber/caster adjustment is beyond me so I just set it like it was. Drives like a new truck again, even without an alignment. Alright, enough shop talk...

Just a quick note, that aluminum wall plate around the mobo is at chassis ground, not board ground, and isn't useful for measuring against when working on the board. The metal "cans", transformer body and or crystal are all at board grounds, usually. Do you have a chassis ground or board ground...

Okay, not sure about the color code, but if the mic audio went low AFTER adding the cap to pin3, try removing the .01 cap from pin3 to ground. Thanks for the info, can never have enough sometimes. Sometimes a pic can mean everything.

Hey I'm thinking off on a tangent here, tell me, how did you set bias on the new finals?

You can use a 2sc945, it's quite common in many radios, if you have a parts donor. Have you tried another mic? Does it growl in tx also? Or just low mod on tx?

Hi RF Krazy, I have been busy this week replacing steering and suspension parts on my work truck, the lower ball joints are atrocious as I have to drill out the rivets, and I hurt all over lol. Your voltages seem fine now after figuring out the ground. Tr32, if the one I'm thinking, is sometimes...

Oh, on another point, this chassis is getting old. I usually recap a radio like this after getting it going, if I plan on putting my seal of approval on it. I'm wondering, did these issues surface after soldering? Are you unplugging the power to the radio when you solder? I ask because I have...

Yeah, I bypass it like you tried to do it, using jumpers if i want to keep the connectors for reinstalling later. You are creating a mic/ptt pass-thru with the jumpers. Let me check my notes on that and pour over the voltage readings.

I assume that's with the echo disconnected and your little jumper removed? So, when everything is wired correctly, it auto tx's? What are voltages when it's auto tx'ing? I'd remove the mirror board while troubleshooting so you're not passing through to the PA sections. I'm thinking fix the...

What are the voltages at the 4558? It serves as a tx switch and mic amp, being common to both functions you are having issues with. I think it's IC4. That is where I would go.

Welcome to my world, of blank stares and drifting attention away from my cb forum life. She gets the same reaction from me too when she shows me pictures of goat buttholes from her goat forum life. Different strokes.

Oh, flashback! Whatever you do, don't bring her a heavy, dead branch! Had no idea granny could still hit em outta the park.

Being a network engineer, anything rack mount is appealing to me. No, I don't have a rack at my radio desk, but I still stand firm on my opinion.

Sorry. My limited experience with these chassis means I must make decisions on hear-say from assumed reliable sources. I overlooked the friend angle, I don't think you would burn anyone and I believe that he is honest. I would like one of these to play with. Do you think he would ship? If so, I...

It has been my experience that a recap can often resolve a majority of basket-case issues, and a recap is often a routine procedure around here, as most of these boys here prefer their classics.

"If it sounds too good to be true, it probably is." ~Grandma I have a friend with one of these, was his favorite radio until he tried it on side band and realized it drifted like a river barge. He never talks ssb, so he didn't notice the drift and instability on am, but his side band reports...

:sneaky: That's what I'm talking about right there.

Oooh, that's a thought, and with suppliers copying digit for digit the original manufacturers datasheet, can't rely too much on just looking them up.

I haven't tried the hg's as I scored a stash of eleflow's 1969 (CB20) some years ago and the 10 or so I have used have not popped yet, or at least they haven't made it back to me anyhow. Thanks for the feedback on the hg's, maybe you can try the eleflow and bring satisfaction.