Re: how to caculate wattage of a nst

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

Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 6/7/03 3:33:10 PM Eastern Daylight Time, 
tesla-at-pupman-dot-com writes:

>Original poster: "Dan Reinders by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <danreind-at-shaw.ca>
>
>Okay, say I'm not interested so much in actual power consumed - what I want
>to know is what wattage I should be feeding into the Freau formula for
>predicted spark lengths.  In this context, is it still volts*amps even with
>open circuit voltage and short circuit currents?
>
>Thanks,
>
>Dan


Dan,

If you're using an LTR value cap,  then volts*amps will be close
if you feed the coil with 120 volts.  If you feed the NST 140 volts
from a step up variac, then the NST may draw about 70% more
power depending on the NST and perhaps other factors.

If a resonant value cap is used (not recommended with a
SRSG or STSG), then some tests I did using an SRSG, suggest
that the NST can draw more than volts*amps even when fed with
the normal 120 volt input.

I speak of wattage above, but the volts*amps (VA) will be higher,
due to a somewhat imperfect power factor even when using
PFC.

John