Re: (ET) relays and precharge circuit

[Rod Hower <rodhower ameritech net>]

My conversion circuit is shown here;
http://www.qsl.net/w8rnh/etrakh/ELECTRAK.PDF
It uses a 150 ohm resistor and 3300uF cap
to create a delay allowing the 50ohm PTC to
precharge the caps before the line contactor pulls
in. About .25 to .5 second delay.
Rod
--- Bob Murcek <rmurcek geisinger edu> wrote:
> Someone (Ron Hower?) had a schematic for his
> solid-state conversion that showed how to install
> surge-suppressing....
> 
> >>> wombat <wombat dssinternet net> 2/12/2004
> 4:08:01 PM >>>
> have you tried low value resistor (,2 ohm or so or
> like the old ballast 
> res they used on cars to drop ign coil voltage - big
> white ceramic things  ?
> 
> sometimes that smooths out the spike enough.
> 
> wombat
> 
> 
> 
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