TIP: Click on subject to list as thread! ANSI
echo: tech
to: Matt Mc_carthy
from: Wayne Chirnside
date: 2003-10-29 06:04:00
subject: Re: Microwave Oven Dying?

-=> MATT MC_CARTHY wrote to ROY J. TELLASON <=-


 MMC>> I'm still hanging onto my dead Heathkit 12" B&W that
I assembled
 MMC>> in 1962.  I used it here and overseas with lots of finicky
 MMC>> adjustments here and there until 1981 when I returned home.
 MMC>> When we had lots of 'hurricane warnings in 1982, I dug it out
 MMC>> and went all through it with the manual and found two resistors
 MMC>> I'd put into the wrong places!

 RJT> And it worked before that?

 MM> It worked fine, but was a real pain setting and locking vertical and
 MM> horizontal.  Where I had screwed up 10 years earlier was putting a 10K
 MM> ohm in the horizontal control circuit, and a 100K in the vertical
 MM> control circuit. Once I found that and swapped them, I had plenty of
 MM> range for adjusting, until it fell over ten minutes later...   :-((

 MM> That GRC-104a was the Heathkit Set number, will have to look up the
 MM> tube number, but it was a rare one even in its time as it had wide
 MM> deflection (120 degrees?) and a very thin cabinet.

I had a neat trick from the get go building Heathkits, I'd place all
the quarter watt resistors in the corrigation of the cardboard boxes
the kits came in in ascending value.
This gave me a first check and I confirmed before soldering.
For 1/8th watt'ers I put a strip of scotch tape over that
and pierced that with the lead as otherwise they'd just slide down
inside the cardboard.
 
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