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Vr11 adjust the driver like it's supposed to, it is a dual final with one 2166 and two 2312s. Vr20 will move the milliamp meter and is set to 50ma but vr10 does nothing.

Thanks Robb, that's how I tested them. Vr20 set to 50ma and also the driver vr11 also set to 50ma test leads between tp7,8,9 where they test with short board removed and on usb and when trying to set vr10 I have no adjustment like it's not working like the low power vr.

Sorry Robb didnt see the link, I didn't know cbtricks was back online, nice. I checked the driver bias and final bias. The driver sets fine with vr11 but the final bias vr20 is the only vr that works on the finals. Vr10 makes no adjustments no matter where its turned, thus why I have only half...

Hey Robb, unless I'm checking them wrong the driver and both finals are pegging my 250 ma scale on my analog meter on dc. Ground on the right leg and positive in the center right? It's the only way I'm getting a reading in receive mode the same as when keyed with no modulation. Over 250ma would...

The dead key low is 2.5 watts and the high is 5 I don't like setting them higher then 6 and will modulate up to 20ish

I'll try to see what I can do when I get home later this evening and thank y'all for the help its appreciated.

Have a nice galaxy saturn that looks like very few have been in, I was tuning up the radio and doing an alignment and noticed when trying to set the radios low power with vr16 there was no difference when turning the vr with the rf power knob at any setting the radio keys rf power all the way...

It only takes a second to swap parts, the voltages were off on the parts I swapped, the caps I changed were 10volt and 16volt i put in higher voltage (so maybe they wouldnt short again) I was checking out the radio where I had just got it, I didn't say this because someone said not to tell just...

Midnight special If I knew for sure what parts made my internal speaker and pa work right again I'd tell you but all I really know is I swapped out tr3, tr17, tr18, c52, c66, c71, R51 and the pa and external speaker jack. You might not need to change all those but I didnt know my new speaker had...

Nice!!!!!! It works, I'm guessing that whatever blew the speaker that was in it when I got it also got to the one I put into it shortly after I turned it back on so one of the many parts I swapped out was shorting the speaker and blowing them up. Thanks all of you who tried to help with this...

Ok so I just checked the speaker again and it's bad? Already? Worked fine when I tested it and no sound ever came out of the radio through it. I'm gonna try another speaker then I'll get back with what happens in a few.

I also changed both r51 and the external speaker jack and pa jack nothing has worked yet lol I'm not sure where to go from here theres not much left stopping the speaker from working.

I changed all the ceramic caps leading speaker ground to chassis ground yesterday, I though maybe the problem was there but still no sound from internal speaker.

Midnight special, the pa is for public address only it's not supposed to receive through the pa Jack, but to only make it a loud speaker. Loosecannon the negative to the speaker is soldered on board and that connects speaker negative and w5 to c52 that goes to a ground screw to the case. W5...

I changed most of the other parts to try to fix the condition of rx in pa mode on the pa side with an ex speaker. I figured it was a short bringing rx in pa mode. But for the radios speaker itself I tried "jumping" t1 and r51 and had no change. Thanks again for your help loosecannon I needed...

Ok so I just finished changing all the switching and regulator transistors for tx/rx and nothing yet. Not saying yall are wrong by no means lol but I didnt think it was a switching problem. It switches from tx/rx just fine with an external speaker but still could have been shorted somehow. I...

Thank you all for the replies, sorry I just got in. I'll check the jacks and see but I tried shorting already and still didnt make the speaker work. It's ok OldTech03 lol. I've changed a few of the switching transistors but no difference so far. I'll have to break out my test equipment and get...

I know i know, another cobra with no receive lol. But this one is an exception, I've repaired close to 100 different 29s over the years and I'm stumped. I bought this from a friend and he said he has to use an external speaker to hear anyone so I figured ok I'll buy it. The speaker was bad when...

Sorry nomad I meant to say tr38 I've never changed tr48 in this radio

Does this sound like a bias problem if so would it not have keyed up the same wattage as before with changing the finals again until they went kaput and I never saw any mysterious blue smoke lol. I meant to say I tested the 2 finals I took out and they were both still good. So I'm closer but...