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Re: Newbie question





---------- Forwarded message ----------
Date: Wed, 15 Oct 1997 09:13:59 +1200
From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Newbie question 

Hi student,

> From: student_of_agoshtas <ceg4760m-at-cs.wright.edu>
> To: tesla-at-pupman-dot-com
> Subject: Newbie question (fwd)
> 
> 
> Hello all.  I'm new to coiling and I have a few basic questions regarding
> coil construction.
> 
> 1.  What are some good products for coating Tesla secondaries?  I've seen
> acrylic-based dielectric sprays out there, but they're 3x the price of
> your run-of-the-mill spray on acrylic from the hardware store.  In
> particular, I don't want to use a product that will attack the enamel on
> the wire.
> 
> 2.  Has anyone built a HV switching supply for a Tesla?  I'd like to build
> a 15 kVDC supply using an off the shelf switching controller IC from
> National Semiconductor.  The tricky part will be the boost-transformer.  I
> thought I'd use a U or toroid core of 77 type ferrite wound with a 1:125
> ratio.

What are the characteristics of 77 ferrite? Can you name a 
Philips/Siemens alternative type? I'm unfamiliar with 77. Who is the 
manufacturer of this type?

Thanks,
Malcolm