[Amps] Pi Output load capacitors

[gudguyham@aim.com]

Dennis, I’m not so sure if Heath stopped the old style capacitor for SWR purposes more so than cost.  The older style caps work quite well and I prefer them.  That’s just my preference.  As far as the circuit breakers they are 10 amp and they are rather generic.  Can easily find them anywhere.  Lou


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On Wednesday, April 13, 2022, 1:59 PM, Dennis W0JX via Amps <amps at contesting.com> wrote:

I am building up an SB-220 - for 6 meters - from a box of parts I bought a few years ago. I got most everyting from a disassembled SB-220 except for the plate and loading variable caps and some sheet metal.
Apparently there were two different chassis used. The early version which I have, used a close spaced loading capacitor. The later version which I purchased in 1977 used a variable more like a transmiitng cap with wider plate spacing. Apparently Heath discovered that the early receiving type spaced variable was inadequate for higher SWR levels.
For the plate tuning cap I have adapted a surplus 50 mmf variable that was used in the BC 312 tuning units. For the output loading cap, I am using a Johnson transmiting variable of about 150 mmf.
I need to find two SB-220 circuit breakers as I did not get these. Does anyone know the amp rating and manufacturer of these breakers?
73 Dennis W0JX 
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