Re: John's sync-adjust circuit

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

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

In a message dated 1/31/01 10:14:29 PM Eastern Standard Time, 
tesla-at-pupman-dot-com writes:

> Original poster: "Richard Wayne Wall by way of Terry Fritz <twftesla-at-uswest.
> net>" <rwall-at-ix-dot-netcom-dot-com>
>  
>  John Freau, all,
>   
>  What effect does different inductance values for different variable auto
>  transformers (Variacs) have on the circuit?  Since this is a LC resonant
>  circuit of sorts shouldn't variac inductance affect capacitance?  Also
>  motor inductance should play a role.  Seems like there may be multiple
>  dependant variables here.  Any work done in this area?
>   
>  RWW

RWW, all,

I guess the motor inductance mostly determines the capacitor size, 
and the variac just needs to have enough inductance?  I did all my
tests using the same variac.  With my variac, the max voltage is always
found within the first half rotation of the variac knob.  Beyond that
(more L), the motor voltage starts dropping off.  I suppose that a larger
variac with more L, would cause this voltage drop off to occur earlier
in the knob rotation, and the motor may lose lock at some point.
That's all the work I've done.  I'd be interested in hearing of other's
findings on these issues.

John