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Dan,
Fusing blowing issues aside you mentioned you're hoping the performance
to be the same. Sadly I doubt you will get the same performance unless
Lady Luck shows her hand. A SRSG is never a straight swap for a static,
the optimal cap size for one rarely if ever suits the other. This is the
reason a lot of people give up with them, plus the hassle of converting
a motor of course and controlling the phase correctly. Unfortunately the
real benefit of a Synchronous system can only be utilised if you use an
external ballasted transformer, NOT an NST with it's inbuilt shunts.
Don't run ARSG (asynchronous) with a NST unless you're feeling brave and
don't like the NST much.
As for SRSG if bored sometime have a look at a very old post from Richie
Burnett (below) but in your case with a NST as the power source, because
of its inbuilt shunts none of it will apply, but it gives you a flavour
of how things can work with an SRSG.
I finally got my SRSG online tonight. To my dismay I started blowing 30 amp
fuses in my supply variac. I am hoping the list can help me figure out why
this is happening...we have guests coming over for Thanksgiving and they
are expecting a show!!! LOL
When I was running the previous setup using a vacuum quenched single gap,
my NST bank (15kv @ 120ma) was only pulling 10 amps using a total of 302 uF
in PFC caps. I was expecting similar performance with the rotary gap.
Basic specs are:
6.5 x 26.5" secondary with 1,057 turns or 22 awg
.033uF MMC
1.8 kva NST's
Terry Filter
1/2 HP, 3,600 RPM motor
2 flying electrodes (1/8" tungsten, through disc design), for 120 BPS
Thanks for any insight,
~Dan
Kansas City area
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