Help with tubecoil
I have just acquired two QB3.5/750 transmitting tetrodes. American
equivalents are for example 4-250A and 6156.
I'm planning to use them probably in push-pull mode.
Some class-C operating info:
What kind of a primary/secondary coil would best suite these tubes? I have
bad experience with candlestick secondaries. Would the Dr.Resonance
suggested 4.5:1 ratio be the best?
I'd also like to hear suggestions about what kind of parasitic/RFI
suppression to use with such a coil.
Please send your replies also to tero.ranta-at-bigfoot-dot-com