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Re: Wiring the entire circuit

Original poster: BunnyKiller <bunikllr@xxxxxxx>

Hey Jerry..

an async motor spins at 1750 rpm and therefore doesnt keep up with the sine wave ( there is a certain amount of rotor slip designed into the motor to allow it not to keep up with the sine wave)

a sync motor spins at 1800 rpm keeping up with the sine wave of the wall supply... ( but there are 2 different types of sync motors, one that starts anywhere and one that starts in the same place every time we like the one that starts the same place every time)

sooo why is this difference important? as the sinewave is building up in the transformer and producing the hi voltage peak, the sync gap is spinning its rotor to keep up with it, as the voltage peaks, the spark gap lines up with the stationary electrodes and conduction occurs pretty much the same time the hi volt reaches peak levels. ( this is considering you have the rotor properly aligned on the motors shaft)

an async motor will line up at different points on the sinewave and sometimes will not align untill way after the hi volt peak has been reached and allows the stored voltage in the cap to become a problem since it wasnt "released" into the primary

a static gap will fire off when the voltage level is reached that is set by the cap distance.. if the gap is set too wide it will also blow the NST just like an async rotory gap is capable of doing...

hope this helped...

Scot D

Tesla list wrote:

Original poster: Jerry White <starcatfisher@xxxxxxxxxxxxx>

What is the difference between async and sync spark gaps?
 thanks, Jerry

Tesla list <tesla@xxxxxxxxxx> wrote:
Original poster: robert heidlebaugh

Ben: I question your choice of an asynchronous motor on a AC coil with a NST
to power it. If you were using DC to power the coil you would have no
problem. NST 's have a history of not liking async spark gaps.
Robert H