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How do I make my HV chokes?
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To: "'Tesla List'" <tesla@pupman.com>
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Subject: How do I make my HV chokes?
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From: Tesla List <tesla@stic.net>
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Date: Mon, 23 Feb 1998 16:19:43 -0600
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Approved: tesla@stic.net
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From: Gregory R. Hunter [SMTP:ghunter@mail.enterprise.net]
Sent: Monday, February 23, 1998 1:54 PM
To: Tesla List
Subject: Re: How do I make my HV chokes?
> From: Greg Leyh [SMTP:lod@pacbell.net]
> Sent: Saturday, February 21, 1998 12:53 PM
> To: Tesla List
> Subject: Re: How do I make my HV chokes?
>
> Gregory R. Hunter wrote:
>
>
> > What's an L-diode filter?
>
> It's like an L-C filter, except with a diode
> in place of the C:
>
> + --CHG--+--RFC---
> |
> HVDC supply< D >to pri ckt
> |
> - -------+--------
>
> The diode clamps any negative excursions
> that make it back thru the RFChoke, thereby
> protecting the CHarGing reactor. Positive
> excursions do not pose a problem, as they
> are never higher than the HVDC supply.
>
> It's much more effective at attenuating RF
> than a standard L-C, and does not have any
> self-resonant properties to worry about.
> Both of my present coils use this scheme,
> and the measured negative excursions stay
> well below 100V.
>
>
> -GL
>
Thanks for the explanation. This is fine for a DC power supply.
Wouldn't do anything for someone trying to protect an NST or OBIT. I
can see how it would be great for clamping negative kickback, but how
is it superior for attenuating RF? The diode diverts RF better than
a cap?
GH