Re: Equi-drive vs. standard drive, was SGTC

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: FIFTYGUY@xxxxxxx 

In a message dated 4/30/07 12:47:05 A.M. Eastern Daylight Time,
tesla@xxxxxxxxxx writes:

>I believe Hull's hypothesis was
>that blocking the 60Hz on the  primary, via a capacitor on each side, would
>make for a more pure  ringdown.

I *still* don't see how the "Equidrive"  could affect even 60 Hz on the
primary. If you have just one cap in series with  the primary, 
wouldn't it block 60
Hz current just as well?
Is there some stray significant coupling to ground that  I'm overlooking?

> Without bleeder resistors on each cap,  there
>is a chance that the capacitors will be in a charged or partially  charged
>state when the power is removed.

Yet again, I *still* don't understand why there's a  difference with the
"Equidrive". The two caps are tied together by the primary,  and the 
transformer's
secondary completes the circuit.

>We found no measurable difference in arc length or RF  output
>characteristics. We did find that a cap would occasionally be left  charged
>and for that, we abandoned the Equi-Drive topology.

    Thanks for the anecdote!
    Obviously, it must be *possible* to end up with a  charged cap. I know
I'm sounding like a broken record, but I'd just like to know  *why*?

-Phil LaBudde




************************************** See what's free at http://www.aol.com.