TSSP: List Archives

From: FutureT@aol.com
Date: Thu, 16 May 2002 14:36:40 EDT
Subject: Re: [TSSP] Topload breakout potentials

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In a message dated 5/16/02 1:53:06 PM Eastern Daylight Time, 
paul@abelian.demon.co.uk writes:


> Thanks for the details on the primary winding, that's very helpful.
> I'll work through those this evening.
> 
> John wrote:
> >  I seem to see about 220kHz which doesn't seem correct.
> 
> For the larger toroid, that sounds a bit high.  I've had to 
> guess a few things...can you measure the secondary inductance?
> 
> Paul,

I remeasured the resonant frequency.  I had a bad connection
at the base of the secondary.  Now I get a resonant frequency
measurement of 147kHz, according to my scope using the
6" x 24" toroid.  The secondary inductance is 36.7mH.  
About 70 turns per inch.

Thanks,
John

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In a message dated 5/16/02 1:53:06 PM Eastern Daylight Time, paul@abelian.demon.co.uk writes:





Thanks for the details on the primary winding, that's very helpful.

I'll work through those this evening.



John wrote:

>  I seem to see about 220kHz which doesn't seem correct.



For the larger toroid, that sounds a bit high.  I've had to 

guess a few things...can you measure the secondary inductance?



Paul,



I remeasured the resonant frequency.  I had a bad connection

at the base of the secondary.  Now I get a resonant frequency

measurement of 147kHz, according to my scope using the

6" x 24" toroid.  The secondary inductance is 36.7mH.  

About 70 turns per inch.



Thanks,

John

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Maintainer Paul Nicholson, paul@abelian.demon.co.uk.