The other night was using my SB-220, plate amps read .4 and grid 1.5. I was on CW/Tune. Towards the end of my cw qso, the amp dropped out on me....
Lately I've been noticing a rattling noise coming from my SB-220's cooling fan upon cold start. It's not a ticking, but a definite rattle which...
Any one ever use one of the new front panel overlays sold on EBAY for a Heathkit SB-220, Or should I just get a whole new panel? Thanks Bucky WB3GDA
Hello from Dan. kb7uxe. I am talking with a company to make replacement meters for the SB220 and SB221 amplifiers. the old ones get sticky etc...
One of the biggest flaws with the Heathkit SB amplifiers were the small Input Cathode Chokes. In this photo, see the SB-200 choke (top), the...
I have two amps. Heathkit SB-220 (two 3-500z) Hammond HL-2000A (two 3-500z) The SB-220 requires 55-65W (depending on band) to get 600W out in...
