Gary - if the drift is only on 160 - for hell of it -add another 2000 pfd or so plate bypass at cold end of the plate RFC - I had that happen in another amp on 160 - allegedly an "unauthorized" facto
The original B$W 800 plate choke is far from adequate on 160 to start with and causes problems at both ends. The 802 was a bit better and its been awhile since Ive been into those amps so dont know i
amps so dont know if the big Ameritron will fit. Carl" As I recall, the Ameritron choke and RF Parts RFC3 are the same. I have replaced the B&W 800 series chokes with the RFC3 in Alpha 77Dx, 70V, an
Ive used the Ameritron (never paid extra from RFP) as high as ~4KW + SSB/CW in modified LK-800A's using the 3CPX tubes and with the LK-550 transformer. And also 2 holer AL-1500's which was as simple
I have an Ameritron choke to go in my 77D, just need that bag of round tuits! The Ameritron choke is not a panacea however. Used in the Alpha 78 there is a nasty fire starting resonance when operatin