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I am rebuilding an SB220. Harbach Electronics has been out of its parasitic suppressor kit for some time now. Anybody know of anyone else who makes this suppressor or has plans so I could build my own?
Screen Regulator
I'd be very interested in what you are going to use for a screen voltage regulator. I build a 2 meter amp using a single 4cx250 a few years ago. I wanted it to be all tubes so my screen regulator was a shunt type adjustable regulator using a 6L6 and a double triode (a 6sn7 I...
Take care
There is a connector on the rear of the sb220 that will attact to the keying circuit of your transceiver. Your transceiver should have a keying output jack usually on the rear. The SB220 is not like a solidstate amp. It has to be externaly be keyed. The rf from your transceiver...
I am homebrewing a crystal controlled am transmitter. I want to use it on the 80 meter band and possibly on the 160 meter band for a plate modulated QRP AM transmitter. I am using a single 807 for the PA. I currently have utilized a crystal oscillator but I have a heathkit 80-10 meter VFO I...
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