ASR33 selector magnet driver card

dwight elvey dkelvey at hotmail.com
Tue Mar 20 12:08:50 CDT 2007




>From: Mr Ian Primus <ian_primus at yahoo.com>
---snip---
>
>So - in replacing this component, what should I be
>looking for? The only specification givin is 100A, but
>I see varistors in various places rated in terms of
>Joules or Volts. I don't want to replace the varistor,
>only to have it not give me any protection for that
>transistor.
>
>Thanks!
>
>-Ian

Hi
One could also use a pair of power zeners. Wired back to back, they
make a fare protector. Actually, in your case, a single zener might be
better. It would clamp the voltage in one direction to the normal
operating level while allowing only a diode drop the other direction.
Dwight

_________________________________________________________________
It’s tax season, make sure to follow these few simple tips 
http://articles.moneycentral.msn.com/Taxes/PreparationTips/PreparationTips.aspx?icid=HMMartagline




More information about the cctalk mailing list