Re: Q, Coupling and things

• To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
• Subject: Re: Q, Coupling and things
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Tue, 4 Nov 1997 22:32:28 -0600
• Approved: tesla-at-stic-dot-net

From: 	Edward V. Phillips[SMTP:ed-at-alumni.caltech.edu]
Sent: 	Tuesday, November 04, 1997 2:20 PM
To: 	tesla-at-pupman-dot-com
Subject: 	Re:  Q, Coupling and things

"When the secondary is in place, the coil has a double humped response of
253Khz and 298 kHz.  Can anyone explain how this is?  Is it the two coils
now having different resonant frequencies?"
	Coupling too high (coils too close together).  The coils
can be tuned to exactly the same frequency and the effect is still
there.  Look up any radio reference book under double-tuned transformers
or coupled tuned circuits, etc.  Has been known since the beginning
days of "wireless".  A spark transmitter so coupled put out what was
known - correctly - as a "double wave".
Ed

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