[Heathkit] sb-303

Wed, 5 Nov 2003 13:49:48 -0800

Hi Dan;

Maybe the tuning condenser plates are touching. A pretty common problem.
I have spent hours with a piece of shim stock and an ohmmeter to get all
the plates aligned in a damaged tuning cap. An ohmmeter across each
section should show if they touch at anyplace as you run it through it's
range.

Re the pilot lights. They are in series and you apparently have a short
to ground after the first one. This shorts out the other two and gives
the one the full voltage. Good luck.

Ed Richards K6UUZ

On Wed, 5 Nov 2003 15:02:45 -0600 "DAN COTSIRILOS"
<[email protected]> writes:
> Just got a sb-303 and it has a few weird problems, maybe they are all 
> connected. the pto tunes fine from 0 to about 300 and then for about 
> 50 kc it loses receive and goes into a loud (30 over 9 on S-meter) 
> static, go past 350 and the receive returns and then repeats the 
> static at  about 400 to about 450. somewhere in between all this in 
> a few spots, I get a full s-meter carrier like a calibrator but it 
> is for sure not the calibrator!  Also at random the s-meter bulb 
> goes 3 times brightness and the other 2 lamps go dead. This is 
> temporary, In a short time the lamps go back to normal. Anybody got 
> any ideas?  Dan
> 
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Ed Richards K6UUZ