Re: More tube coil stuff (Carl Willis)...

[FutureT-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

In a message dated 8/31/00 5:10:20 PM Pacific Daylight Time, tesla-at-pupman-dot-com 
writes:

> Finally, a word about my spark.  If I put a nail on top of the toroid Freau
>  Style, I get about 15" brush discharge maximum.  

Carl,

Are you using a very long time constant in the grid leak network to
create pulsed operation (grid blocking)... what I used to call the 
sputter mode?  I no longer use such a mode.

Are you sure the coil is tuned very precisely?  I would expect at least
a 19" discharge using the nail.  Streamers should be somewhat straight
not too fuzzy.  Also grid feedback, grid leak resistance, etc, are all touchy 
adjustments.  I never run without the breakout point, except at low powers.

I find a fine tuning adjustment range over which the spark length will 
remain the same, but towards the sides of which will reduce the tube
plate redness.

You may remember my recent disappointing VT-27 VTTC experimental
results.

Gotta get back to this tube stuff one of these days....    

John Freau