Re: Isis and Osiris--Victory At See

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Parpp807-at-aol-dot-com>

Antoine, Ed, Nick

The Twins produced a 73 inch spark today with lots of wasted energy
streamers coming from the toploads. The spark is more blue than white
and it is not at all steady. A problem is that one topload is 29 inches from
the clothes washer and both are only 27 inches below the duct work and
conduits. I think improvements can still be made. 

I have a length of bare # 12 wire, the ends of which are connected to the 
secondary bases. I can move the powerline ground tap along this wire. Now 
that the coil is decently
tuned I am unable to find any evidence of the "ground tuning" effect. The 
electrical
zero point does not shift. This effect was definitely noticed when I was 
tuning the
primaries. I consider that question very much open for more experimentation.

The coupling is adjusted by sliding the secondary up and down on a smaller 
diameter 
piece of pvc. The coefficient of coupling is very high. When I checked the 
range of k
using Terry's method the coil was untuned. But with the sec fully lowered 
into the
primary, (a solenoid tuned from the bottom up) the high k was nearly 0.3. 
Now, with a decently tuned coil, the secs are nearly fully lowered to maximum 
k but there is no pri-sec arcing and no racers. Maybe I can reduce the 
diameter of the primaries by an inch? 

The process of tuning the TWO series connected primaries to an F res = to F 
res
for EACH secondary is a mystery to me. The secret may be in the M mutual 
inductance
between the two primaries but I still do not understand it. Maybe Terman or
Butterworth will help.

Happy day,
Ralph Zekelman

As long as I can keep the sparks out of the washer and off of the ceiling, 
this beast
may be capable of greater spark length.