KLH Model 21 found at Goodwill today!

[jr_tech]

I have used a product called "goof off" successfully to remove latex paint splatters without damaging the underlying wood finish on older radios... I suspect that it would work ok on the KLH.

jt

[Captainclock]

Originally Posted by jr_tech

I have used a product called "goof off" successfully to remove latex paint splatters without damaging the underlying wood finish on older radios... I suspect that it would work ok on the KLH.

jt

Alright, I'll see about picking up a bottle of that. The only problem is that there's some paint spatters on one of the knobs as well and I tried scratching it off with my fingernail and it wouldn't come off and I know goof-off isn't going to be good to use on something like plastic because it has stuff in it that hard on plastic, so I wonder what I would use on the knobs to clean them up.

[WISCOJIM]

Try the new Goof Off 2. "SAFE ON PLASTIC!"

[Captainclock]

Originally Posted by WISCOJIM

Try the new Goof Off 2. "SAFE ON PLASTIC!"

OK, I'll see if I can find some.

[Captainclock]

Well I replaced the original 2000 MFD 30V Power Supply Cap in the radio with a 2200MFD 50V capacitor and its still has a 60Hz Hum coming out of the speaker and still no audio out of the speaker from the tuner. So what should I check next in the circuit that could be causing my issue? I also tried posting this in AudioKarma but for some reason when I went to post it it wouldn't post it would act like it was going to post the thread but then it would wouldn't actually post anything.

[jr_tech]

I would suspect that one or both of the diodes in the rectifier circuit could be shorted or have very high reverse leakage... you can get a manual here from Phil's old radio site:

http://antiqueradio.org/KLHModelTwentyOne21FMRadio.htm

Thanks again to Phil Nelson for his wonderful site,
jr

[zeno]

KLH built some very nice stuff. Our shop saw a lot
of it being 20 miles from Cambridge. Also piles of
H.H. Scott that was 5 miles away.
Anyhows change ALL the lytics first. I remember a few
of the stereo ones going DEAD in one channel & that
was it. ( 30 yrs ago ). Another thing that may be it
is if it uses ua703 IC's in the IF they were trouble
especially on Scotts sets. In any case when its running
again you will wonder what all the hoopla about digital is.

73 Zeno

[Captainclock]

Originally Posted by jr_tech

I would suspect that one or both of the diodes in the rectifier circuit could be shorted or have very high reverse leakage... you can get a manual here from Phil's old radio site:

http://antiqueradio.org/KLHModelTwentyOne21FMRadio.htm

Thanks again to Phil Nelson for his wonderful site,
jr

Thanks for the link, I tried to download the service manual but the link to the service manual in Phil's Website didn't work.