Hey-Hey!!!,
I drew it, but I have no St.70 to experiment on. It's a remarkably generic front-end. With a few component changes, it can be applied to nearly any U-L final stage. So far I've only used it on DH finals, but any ole power tube should be just as happy. There's a few other folks who have run 6L6's with it.I need to work out some details on the 813 amp. I have to rig a fairly high-power umbilical for those 2-channel beasties. That and getting the Peerless S-271-S output's wound, stacked and waxed...:) That big 5k should make for an interesting comparison between the stock Citation II iron. Fortunately Heyboer is in no rush to get those TX's underway.
The project is getting bigger and bigger, I suspect some of the issues will need solved as it is built. It will have 10VAC on its filaments.
cheers,
Douglas
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