Hey-hey!!!,
It is just as well to wait a bit. I am acquiring a bit more interesting Iron. For the amp under discussion, a 10k a-a load is just about perfect. There is some lower( numeric ) loads comming available soon enough I think. 8k @ 20W, 6k6 @ 20W for starters. Let alone the copies of the mediocre Dynaco stuff.The trick remains to be able to put the taps in the plate winding in strategically important spots. It seems that the better Iron has more layers, which shrinks the percentage of winding per layer and increases the number of options. The 10k OPTx I've been playing with has 20 layers from a-a, so 10% increments are easy to do at the ends of the layers.
regards,
Douglas
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