Re: Coupling coeff. vs Voltage gain (was Re: Who needs aquenching gap ?)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-uswest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "Bert Hickman by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <bert.hickman-at-aquila-dot-net>
> 
> Ed,
> 
> A minor quibbling point - when k=1, the upper sideband goes to
> infinity, but the lower sideband only drops down to Fo/Sqrt(2), not
> zero.
> 
> This is because (for large coupling coefficients and Q's of primary and
> secondary not too unequal):
>    F upper = Fo/Sqrt(1-k)
> and
>    F lower = Fo/Sqrt(1+k)
> 
> I fully agree that it's amazing that such a simple circuit leads to such
> interesting and complex behavior...
> 
> -- Bert --

Bert:

	Are you sure those are the EXACT expressions for such high coupling?  I
don't have the derivation here and am too lazy to work it out again, so
can't check it.

Ed