RE: question about driving a DC sync spark gap

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Leigh Copp" <Leigh.Copp@xxxxxxxxxxx>

400 volts is the key rating here.

Per my post a few days ago, you need 2 X V peak (so 338 volts at the
absolute minimum) to survive 120Vrms line applications.

The frying diodes in question were only rated at 250V or less I believe.

Leigh

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: October 17, 2006 11:59 PM
To: tesla@xxxxxxxxxx
Subject: Re: question about driving a DC sync spark gap

Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>

400 Volt, 8 Amp.  The motor is a 220 volt treadmill motor, but it only
needs
50 volts or so in my RSG.
--Steve Y.
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, October 17, 2006 8:09 AM
Subject: RE: question about driving a DC sync spark gap


 > Original poster: "Leigh Copp" <Leigh.Copp@xxxxxxxxxxx>
 >
 > Steve,
 >
 > What is the reverse voltage rating of your bridge?
 >
 > Leigh
 >
 > -----Original Message-----
 > From: Tesla list [mailto:tesla@xxxxxxxxxx]
 > Sent: Tue 17/10/2006 1:15 AM
 > To: tesla@xxxxxxxxxx
 > Cc:
 > Subject: Re: question about driving a DC sync spark gap
 >
 >
 >
 > Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
 >
 > Miles,
 >
 > I also use a DC motor with my async RSG.  I have had no problems with
the
 > bridge rectifier, which is only rated for about 10 amps.  I think
perhaps
 > the secret is to mount your bridge rectifier and filter cap adjacent
to
the
 > motor so that connecting wires are only a few inches long and cannot
pick
up
 > any significant RF or other nasty impulses.  Then feed AC from your
variac
 > to your rectifier/filter/motor through your 10 or 20 ft power cable.
 >
 > So far, with six foot streamers flying around, this works fine
without any
 > filtering of the AC power cable.
 > --Steve Y.