The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

Radio seems to work fine until I plug in a remote speaker, Then it howls to no end! Have tried 3 different speakers and it does the same with each. Using a ASTATIC 636 mike.

hi there,does the radio have talkback.and does it howl with the talkback on or off........ramblingman

I did some more searching and think I found out what's wrong. Radio has been peaked. According to dxzone, this will cause my radio to squeal thru a hardwired talkback circuit. would you agree that to solve the problem I need to cut a jumper wire on the board??

Thanks for getting back to me on this!

hello again,well if it was me i would cut j-15 jumper,and install me a spst toggle switch in rear of radio.so i could have switchable talkback,.also do the mod shown on dxzone.com.add a 470k resistor from the junction of c154/r207 to the junction of c187/r235.this is a good mod,ive tryed this one.it is good for a peaked radio it will stabilize your talkback and make it sound cleaner.go to www.dxzone.com/cgi-bin/dir/jump2.cgi?id=2482 and this will show you where to put the resistor on the solder side of the pc board......good luck with your radio.......ramblingman

Thanks for the advice. I will install the switch and the resistor.