Re: rotay spark gap

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "colin.heath4 by way of Terry Fritz <twftesla-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>

im not sure of the motor type
i have realised though im running on the start windings which is not good
i will rewire the motor tommorow which will help no end
cheers
colin heath
----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, March 23, 2002 6:21 PM
Subject: Re: rotay spark gap


> Original poster: "Dave Lewis by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<hvdave-at-earthlink-dot-net>
>
> Might be a phase problem, ie your gap is lining up at the zero crossing of
> the cap voltage.   What kind of
> motor are you using?   The one I built has one of those hysterisis motors
> which has no fixed pole.   The
> phase setting is more or less random when I spin it up.    I've had luck
> adjusting it by flicking the
> power to the motor off for a quick second or so.  After a few dozen flicks
> I'll luck into the correct
> phase setting.   I like to set mine so the gap fires at the very peak of
> the cap voltage waveform, I
> monitor one of the NST outputs on my scope to know if I've got it right.
> Once I get it going I dont shut
> it off.   A strobe would be handy for this.
>
> Good luck
> Dave Lewis
> (novice coiler)
>
> Tesla list wrote:
>
> > Original poster: "colin.heath4 by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>
> >
> > hi all,
> >         iv ran up my srsg today and had no joy really .
> > i only got it to fire when the gap slowed down after shutting down the
> power to
> > the motor.
> > could this be due to the gap between the post and electrode being too
wide
> > im using a mot supply with voltage doubling
> > any help will bew much appreciated
> > many thanks
> > colin heath
>
>
>