first light at 200BPS

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

Original poster: "Gregory Peters by way of Terry Fritz <twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>

Hello all,

Well tonight, fellow list member and coil builder Paul A came to 
witness my 12" coil in operation. At first we ran the coil at 400BPS 
(sync) and noted that varying the phase angle made no change to the 
output (as expected) and that the current draw was surging and 
causing plenty of scary noises to come from the ballast welders and 
pole pig, showing that at this break rate, there is probably little 
advantage to synchronous operation over async operation. Nothing 
wrong with the sparks though, solid >10 foot arcs and easy 9.5 foot 
strikes to a grounded pole. We then removed half the electrodes from 
the rotor for 200BPS operation. I have always been a booster for 
ASRSGs, but I have to say I am converted. The sparks were no longer 
(though Paul may not agree). So why do I love SRSGs now? Well, the 
coil was an absolute pleasure to operate. Kind of like controlling a 
light with a dimmer. The current and voltage meters stayed dead still 
(except when I varied them myself). Current draw dropped to under 30 
amps. So now I'm making over 10 foot arcs with less than 7.2kVA. This 
was with a nasty shorted turn and a breakout point on the toroid. 
This is pretty efficient in anyone's books as far as I'm concerned. 
Paul can back up these figures. I can't wait to wind a bigger 
secondary, add more tank capacitance and run it at 100BPS!



Cheers,

Greg.