-----Original Message-----
From: Tom Rauch <w8ji@contesting.com>
To: amps@contesting.com <amps@contesting.com>; Steve Thompson
<g8gsq@qsl.net>
To: <amps@contesting.com>
Date: 13 April 2001 16:09
Subject: Re: [AMPS] Zener screen supplies
snip
>> I'm a great fan of simplicity - what's the trick for protecting the
>> zener based supply?
>>
>> Thanks, Steve
>
>It would be identical to what you would do with a more complex
>regulator. I'd use a series diode string to the screen with a properly
>designed resistance across that diode string for reverse current.
Yes, now I see it. There had been an embarassing flaw in my thinking
previously.
>
>Did you friend have an electrolytic across his zeners? Like near the
>socket?
Nope
>
>IMO, an MOV is a waste of time. I'd use a gas discharge tube in
>parallel with an electrolytic IF arcing was a big deal, and the series
>diodes.
I guess both can do the main job of saving the socket capacitor, but they
are very different when working for a living.
Steve
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