RE: Capacitor in series with transformer or S.G ? What is right?

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

Original poster: "Sean Taylor by way of Terry Fritz <twftesla-at-qwest-dot-net>" <taylorss-at-rose-hulman.edu>

>    MY UNDERSTANDING OF LTR caps are that the values of
> capacity to be used in the tank circuit are made
> larger then resonant values needed for that used for
> the primary TUNED TO THE SECONDARIES HIGH FREQ
> RESONANCE.  The caps used in the tank circuit have
> nothing to do with 60 hz source freq, or schemes to
> come into that resonance, which is exclusively dealt
> with in power factor correction with manipulations
> made prior to actual tank circuit, on primary side of
> input transformer.

I thought that resonance of a tank cap with the 60 Hz was for maximum
power
draw from the transformer - smaller than resonance, and you wont draw
max
current, and larger, the transformer can't provide enough power to
charge
the cap by the time the AC reaches its peak.  I think thats where
"LTR"
comes into play - if the tank cap is at resonance, or matched
impedance with
the transformer, its possible to get huge voltage and current swings
if the
gap misfires, but an LTR cap will not allow that because it isn't
resonating
with the supply.  If the tank cap was LTR for the primary and
secondary
coil, then the TC wouldn't work right - it would be out of tune.


 If we are to compare the actual L
> and C componenets in the tank circuit to how they ACT
> AT 60 HZ, We find that the primary coil itself has
> practically NO inductive reactance at 60 hz, and the
> total sum of reactance present in the tank is then
> primarily all capacitive reactance and not inductive,
> AS regards to how that 60 hz input will allow
> conduction, then we can conclude that it acts just as
> stated, as a component of primarily all capacitive
> reactance, where any cancellation of total reactance
> made by primary is practically non existant.

The tank capacitor's reactance will match the output impedance of your
transformer at 60 Hz if a resonant cap is used. If a LTR cap it used,
then
the impedance of the cap at 60 Hz will be less than the transformer's.
Ztrans=Voc/Isc, Zc=1/(2*Pi*f*C)


----------------------
Sean Taylor
The Geek Group
G-2 #1204
Because the geek shall inherit the Earth! (c)
www.thegeekgroup-dot-org