[TCML] rsg pulsing

[bartb]

Hi John,

I just got back on emails tonight after a day or two outage, so I'm 
probably late on my reply (ignore if you've found the problem).

I find pulsing odd in your case. This is likely a simple asynchronous 
rotary? I realize you specified 1800 rpm, but I assume that is just a 
rated rpm for the DC motor? Can you give cap size, power source 
(MOT's?), and gap electrode arrangement and spacing? Also, is it a 
constant pulse or intermittent? I'm probably not much help with this as 
I've never encountered a problem like this with a rotary, but I wonder 
if the MOT's are affecting the motor on the mains circuit. You mentioned 
30% on the variac and both coil and rotary pulse. So I'm wondering if it 
pulsed at less voltage. I expect it pulsed right when the coil began 
operating (but wanted to be sure).

Take care,
Bart

John Forcina wrote:
> Ok tonight i took my big coil out for a run since i havent really got a
> chance to tune it yet.  I noticed that as soon as i got it to 30% or higher
> on the variac the spark gap and coil started pulsing really bad. it would
> shoot 6' streamers for about 1/2 second and then stop for about 1/2 second.
> The rsg is a dc 1800rpm 240bps.  I still have no pfc so that may be a
> problem.  Anyway why is this doing this?  Any tips or suggestions would be
> greatly appreciated.
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