Hello John,
What value blocking cap would you suggest for a 136kHz amp I am
building using a single GS35B tube? Thanks.
On Friday, September 8, 2017, you wrote:
> The capacitive reactance Xc of the plate DC blocking ppcapacitor should
> be chosen so that on the lowest frequency it has a low value of ohms.
> This way it doesn't have a significant RF voltage across it, which
> results in heating and loss. On the other hand, if the capacitance is
> much larger in value than required for the lowest frequency, usually
> some self resonance in the capacitor will begin to act up on the higher
> frequencies. Also, a larger than needed capacitor may cost more. A
> single capacitor usually suffices in the application for amateur
> service. If two paralleled capacitors are chosen, they should be mounted
> on flat straps equidistance to the pi-net and to the plate. This will
> produce equal inductance for each cap, so that they share current well.
> 73
> John
> K5PRO
--
Best regards,
Chris mailto:chris@chriswilson.tv
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