Re: SRSG, full power or not?

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

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi Josh,

Double check the safety gap setting.  It sounds too small.  If you are 
using a variac, turning it up to 140VAC can cause this too ;-))

Cheers,

         Terry


At 04:20 PM 7/4/2003 +0000, you wrote:
>Hello folks
>
>I have a SRSG question.
>I use a 1800 rpm motor with 4 electrodes. I can spin the motor to adjust 
>the timing. The funny thing is that it only works right in a range of 20 
>degrees. As I move the motor out side this range the sparks from the TC 
>get bigger and stronger but at full power the safety gaps fire, sapping 
>power.
>The simple answer is don't go out of my 20 degree range. But I can see 
>that there are bigger stronger sparks to be hade if I could just keep it 
>from failing at full power. I'm using a LTR .0692mf geek MMC on a 12/120 
>NST (300mf PFC) power supply.  As it is I think I'm only allowing the cap 
>to charge for a portion of the charging cycle.
>So what's going on hear? If I rotate the motor more, am I'm charging the 
>cap for a longer period in the half cycle causing huge voltage rise? If 
>so, how to prevent the safety gap, set at just over 12kv, from firing. I 
>could widen the safety gap, but then what's the point of having 
>it?   Richard Burnett discuses safety gaps across the SRSG on his web 
>site. But safety's are only supposed to fire if the SRSG fails to. Has 
>anyone had a similar problem?
>
>Thank you all
>Read you later
>Josh