[Heathkit] Heathkit Rescue.

[kiyoinc at attglobal.net]

K5MO wrote:

> wondered the same thing...all that work, to result in that smoke and zap, 
> and disgustedly stuffed in a closet for 25 yrs.  Everything else was fine, 
> and the short was hard to see, but it was the ONLY thing wrong with the rig.

I've seen similar problems.  In the 1960's, I bought a used SB-101.  It 
never worked right, jumping frequency, drifting.

I spoke with the tech at the old Rockville Heath store and he said that 
some folks have fixed the sealed LMO.  That encouraged me to remove it 
from the SB-101, open it and with a diddle stick and freeze spray, I 
found a capacitor with a cold solder joint.

This was in the pre-built LMO.  It wasn't where the wire goes into the 
terminal strip, it was where a loop of wire is wrapped around the 
tubular ceramic!

In looking over the paperwork, this SB-101 had been to Heath and they 
missed this problem.

The builder was a novice who did not upgrade.  The build quality was 
poor but the worse problem was in the LMO.

About 1980, I bought an SB-303 at Dayton.  The fellow claimed it worked 
well, the build quality was good but it didn't receive well so I put it 
on the shelf.  20 years later, I decided to work on it.  I found a 
missing coupling capacitor.

Once I added it, the receiver came to life and signals boomed in.

de ah6gi/4