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C170 ==== +8.88V

Thanks for the response.. I will check C170 and will begin to check voltages from the list...thanks guys!

Found a bad cap at either C175 or C179. Bottem end of cap spilled its gutz. Replaced and still no audio......What else would be screwing with the receive showing no needle movement... .Anybody have any TA7222P IC audio chips laying around????????

I have tried both the internal and external speaker connections and the PA jack.....Nothing!

The S-meter does not show any movement while another radio is showing 9+ on ch6. Before I order an audio IC id like to make sure it is receiving well. Bad diode maybe? Anyone have any experience with this model and which diodes could be the culprit???

Need Help! Just picked up a 959 in a lot of CB stuff. Radio powers on and TX's , but no Audio at all. No static noise.., needle not moving, no PA. Almost hearing something from very loud locals but I would need a stethoscope on the speaker..lol Started changing some caps but some may have...

Thanks for the reply Captain, It more than likely is a Penetrator HB from Amcomm, but all i can see is the first 2 numbers which are both 2. could be 225 228 or 225_.etc. It does not have a band switch, but it could have been modified because of the odd switches and blue Led's. There are...

Thanks for the reply Paws, I have had a little more time to go over the Amp and I noticed that the fron cover had been repainted and new labels put on. The Amp is or was a Amcomm Penetrator HB 22??. The preamp switch is definately only for the recieve as it gives me about 3 S units when...

I just picked up one of these amps and the pre amp seems to be a problem. With it turned on it lowers the total power output to 75W and with it off it hits 150W. If anyone has any info, manuals, specs, etc. Please help out.