From: D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent: Saturday, May 30, 1998 6:58 PM
To: Tesla List
Subject: Re: sync-gap problems
to: Gary, et al
To add to this thread, total gap setting should never be more than 0.200
inches for any NST powered system wether RSG or fixed or subdivided gap.
The NST will not take the strain for long if this value is exceeded.
> From: Tesla List <tesla-at-pupman-dot-com>
> To: 'Tesla List' <tesla-at-pupman-dot-com>
> Subject: sync-gap problems
> Date: Friday, May 29, 1998 10:10 PM
> From: Gary Lau 29-May-1998 0819 [SMTP:lau-at-hdecad.ENET.dec-dot-com]
> Sent: Friday, May 29, 1998 7:33 AM
> To: tesla-at-pupman-dot-com
> Cc: ajones-at-nwga-dot-com
> Subject: Re: sync-gap problems
> >From: ajones-at-nwga-dot-com [SMTP:ajones-at-nwga-dot-com]
> >Subject: sync-gap problems
> >I've just completed an 1800 rpm sync-gap system. The rotor has 4
> >electrodes through its face and two stationary electrodes. The motor
> >can be rotated nearly 180degrees, also.
> >My problem is no spark at the toroid. The rotary makes a dull thudding
> >noise when the gaps fire with or without any static gaps in series.
> >The static gaps also make this noise when used with the rotary.
> >When I remove the rotary from the circuit and use the static gaps, the
> >system works fine. This is the first rotary I have used so I don't
> >know much about them. I'll eventually figure it out, of course, but in
> >the meantime I'm open to suggestions.
> >Alan Jones
> Hi Alan:
> I'm also rebuilding my sync rotary after poor results (~30" w/ sync RSG,
> w/ only static gaps) the first time around, so I'm no expert.
> I'm also puzzled about the noise you describe. I assume it not due to
> or anything else mechanically crashing. I noticed that in mine, the
> the system was distinctly 120 Hz, very different than with static gaps,
> believe this noise was coming from the output discharge mostly.
> Could it be that your rotary gaps are too wide and that it's taking
> half-cycles for the tank cap to ring up to the gap's firing voltage?
> bad for your NST(?) and cap!) Could the gap spacing be changing as it
> Gary Lau
> Waltham, MA USA