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Are pi networks THAT INefficient?

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May 23rd 07, 04:55 PM posted to rec.radio.amateur.antenna

Richard Clark Richard Clark is offline

Richard Clark is offline

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Are pi networks THAT INefficient?

On 23 May 2007 09:37:00 -0500, wrote:

Is that "low efficiency" of 30-50% really true?

Hi Myron,

No. Efficiencies are found (or broken) elsewhere. As Terman offers,
the Loaded Q of the Tube output tank runs between 8 and 15 (the
efficiency you quote would have that plummet). The generalization
offered ("It is not possible to run more than 50% efficiency") is also
the conventional error of not being able to distinguish between a
Conjugate Match and a Z Match.

73's
Richard Clark, KB7QHC

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