Re: New Coil Measurements

To: tesla-at-pupman-dot-com
Subject: Re: New Coil Measurements
From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
Date: Mon, 11 Nov 1996 12:18:37 +1200

A bit more on this....

> Fp     Cp     Lp     Ecp     k     Spark    Vo(35k/")  Vo(lumped)  
> 
> 84.8k  50n   70.5u   2.7J   0.23     12"      420kV      429kV
> 68.8k  100n  57.4u    6J    0.17     19"      665kV      640kV
> 66.5k  200n  28.7u   8.1J   0.18     22"      770kV      743kV
> 71.7k  200n  25uH    11J    0.15     25"      875kV      866kV
> 
> Notes: - interesting correspondence between spark length based on 
> 35kV/" and theoretical lumped calc. This is almost certainly too high
> as no losses in prim are taken into account. My guess is that 40kV/"

Should be 30kV/inch, not 40.

Primary k's are particularly interesting. The 25uH primary has an 
inside diameter of 5.5" and outer diameter of 14" (cf resonator 
diameter of 16.8"). The resonator was sitting atop a piece of 
plexiglass directly on top of this coil. The 28 - 29uH primary was 
this coil + the outer turn of a second spiral sitting an inch below 
it. Worth noting that a decent k can be achieved with a very compact 
primary system. This bodes well for bottling the system up as a 
single unit.

Malcolm