Hello,

I've got a universal ptr-81b that driving me nutz !, I did a cap replacement and cleanup but,

I cant get any stations below about 1300 kc. It looks like to LO is dying below that frequency.

This set uses a seperate oscillator ( not an autodyne ).

A similar set is also made with the Candle name, but both are made by Tokyo Transistor Corp.

I can't find a sams listing for this one, anyone have any ideas ?.

Thanks

Bob R.

Here's the six (6) transistor version of your radio:
https://samswebsite.com/en/photofact/se ... del/PTR62B


And a really good webpage on how to restore one:
http://www.transistor.org/restoration/restoration1.html


I'll have to check my Photofact collection of schematics to see if I can find it under another name.

You can check to see if your LO is really dropping out by tuning in the LO signal with another radio.

~ Mitch ~

remove

Have you tried adjusting the oscillator coil? If that doesn't help, I would agree to replace that stages Transistor.