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Pancake Primary (fwd)




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From:  SBJohnston@aol.com [SMTP:SBJohnston@aol.com]
Sent:  Sunday, February 15, 1998 1:44 PM
To:  tesla@pupman.com
Subject:  Re: Pancake Primary (fwd)


DC Cox:

> If your budget allows an even better material is white delrin
> which is available through any large plastics supplier.  
> Have then cut you eight rectangular blocks approx 3/4 in 
> wide x 1 in high x the length required to hold the number of
> turns you need.  Slots are cut approx 1/2 - 3/4 in deep.  With
> copper strap a good rule of thumb is to allow 1/2 in total 
> spacing between turns per revolution in a flat Archemedian spiral. 

An excellent idea.  I've used small pieces of this plastic as HV insulators
inside transmitters, but I'll have to find a supplier of bigger chunks!
 Perhaps AIN Plastic deals in it...

Thanks for the good mounting idea...

Steve Johnston

sbjohnston@aol.com