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Here is a pic of the top side. Every electrolytic cap has been replaced with new. I put a black dot on each one to keep track. The only cap not yet done is one on the front panel pcb, I think it is a 1uf working from memory. Surprisingly I did not find any old caps that were way off the value...

Thanks for the education it is very much appreciated! I spent some time recapping this unit and tuning the receive section per the manual. Once the correct mic arrives I can move onto the transmit alignment.

Here is the mic I have coming. https://www.ebay.com/itm/364434342419?mkcid=1&mkrid=711-53200-19255-0&siteid=0&customid=link&campid=5336136228&toolid=20001&mkevt=1

That mic I picture above came off this Realistic model.

Thank you Doctor! and thank you Brandon! Doctor, before I saw your message I placed an order for the oem mic that would have been supplied with this radio. Picked up a very nice looker on ebay just about 30 minutes ago.

Yes I can hear people talking and yes I believe it is at expected volume levels. I have a carrier. The trc-453 shows no modulation on the meter pictured. Another known good radio does. I can hear cb audio on the PA speaker when in PA mode but when I key up and talk into the mic I hear...

The mic I am using is this more modern RadioShack 5 pin din and not the original mic that would have been supplied.

Brandon, the light bulb in my head just turned on. The voltages in the manual are in the keyed mode. They all test spot on when keyed. Hmm... then I wonder what is going on.

7.8v not keyed. If I key it the emitter voltage drops to 1.8v and then when released slowly climbs back up to 7.8v over 30 seconds.

Looking at the schematic it seems that the PA section consists of TR30 and IC5 the audio amp chip. I have no problem with audio so I assume IC5 is good. Removed TR30 and tested it on a Atlas DCA55 and it checks good. Next I check the voltages on TR30 in the PA mode and they do not correspond to...