-----Original Message-----
From: Richard <2@mail.vcnet.com>
To: g0ruz@btinternet.com <g0ruz@btinternet.com>; AMPS <amps@contesting.com>
To: <amps@contesting.com>
Date: 25 April 2002 04:10
Subject: Re: [Amps] homebrew glitch resistors
>Is there any mileage in making a homebrew glitch resistor for use in series
>with the B+ using Nicrome wire on a 1 inch diameter ceramic former. It
seems
>to me that it should be fairly easy to make one with the necessary
>resistance,current and voltage breakdown characteristics.
>
>Has anyone done it? The commercial equivalents are really expensive here in
>the UK and we seem to see very few surplus nowadays.
>
? I would build one out of groved Delrin or ABS tubing and Ni-Cr
resistance wire. 12' of #22 Ni-Cr should be about right.
However, we buy glass-coated wire-wound resistors for glitch service and
the price per 250 is just over $1US each. One 10-0hm, 10W unit will
safely discharge c. 30uF @ c. 2900v.
I have a vague memory that one of the valve/tube manufacturers suggests
limiting discharge current to 40-50A for 'normal' tubes, which would imply a
higher resistance. Can anyone confirm/correct please?
Steve
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