Hsu said:
>I think we can use similar design in RF amplifier, add a wide band HV RF
>transformer to change the push-pull output to single end output, so we can use
>same Pi network as same as single end 811A GG amplifier,even we can useing RF
>transformer reduce the output impedance, so we can use inexpensive low volt
>air capacitor(reciving caps).simple input net work, withou screen and grid PS,
>cheap out put Pi network,it seems very perfect amplifier!<
I would be very dubious about the practicality of making the transformer.
You're looking for a wideband transformer from about 13k ohm or so down to
whatever, and that means a lot of primary inductance, and thus capacity
(because of the number of turns) You also need a lot of ferrite to avoid
saturation. With a low impedance arrangement ( say a lot of sweep tubes) it
becoems more practial because the impedance is lower.
73
Peter G3RZP
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