Recent content by Michigan Muskrat

NZ8N thank you! Wow this site is great, such generous folks! I will study your replies and see what we can do on this radio. Thanks for the time of posting the pics and reading my quest, your all great! I like the way you guys communicate with one another!

Gosh Handy Andy, what a great reply. Thanks for explaining in detail, with pics and great reasons why this radio may be having the issues. I really appreciate your time. We will explore the grounds, check for shorts, and look at the mic vs speaker ground routes, especially noting pin 2 due...

Thanks Dmans, I will jot that down. I appreciate the time, and the accurate location to look for the trouble!

I will find out this evening if the CB/PA switch make any difference...

Will do kaos513, thanks for the reply!

President Grant DX is staying in transmit mode even with microphone and cord unhooked from radio. It has the 999 board. When turning radio from off to on, it takes about a second then goes into transmit mode, also I can heard what sounds like a roger beep tone, which stays on continuously...

Yes!!!! It was a bad transistor (Q102 on schematic), it was receiving the 8.2v but was not giving the proper voltage at the base and emitter, changed the transistor and it it works like crazy! I also just recapped the Roadtalker with 52 Nichicons, and it barks like never before! I talked ssb...

Thank you Mike. I appreciate your knowledge.

OK, the AM detector will be checked, this is what I'm looking for, some direction of where to start on the board for AM receive. Thanks!

Thanks, I will give the PA /external speaker a try for modulation/receive.

I've a Sear Roadtalker 40 SSB base model 934.38310700 that has an issue with AM receive only, SSB LSB and USB receive works great. When the switch is turned to AM, the volume drops down to next to nothing. It's like to volume slide switch isn't working. The receive voices are barely heard...

Your right Mechanic, new caps throughout would be a good thing in an older radio. Good suggestion.

I will get the schematic and do as you suggest and will also look at Robb's suggestions and see what I come up with. Thanks, this forum really helps a person, especially a guy like me, who really doesn't dabble in electronics too much.

Thanks Sonoma. I will check that. I appreciate the help.

OK Robb, I will check D32, D40, mode switch first and let you know. Thanks for the fast response.