From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: saltwater capacitance
Date: Fri, 23 Sep 2005 14:54:18 -0600
Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
Due to the difficulty in determining the precise
surface area of an irregular shaped bottle, it's
a lot easier and more accuate to measure it.
Just haul one down to any large Univ. EE dept
and ask a researcher to take a measurement for
you. Inexpensive handheld meters like the
Wavetek 37 will do it in a few seconds. Where do you live?
Dr. Resonance
Original poster: "Daniel Giv'r" <transworldsnowboarding19@xxxxxxxxxxx>
hey how do i calculate the capacitace of 12 saltwater capacitors?
thanks
Daniel
From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: DRSSTC Additional questions
Date: Thu, 22 Sep 2005 18:12:44 -0600
Original poster: Skip Greiner <sgreiner@xxxxxxxxx>
Hi all
Ok, the primary feedback using Steve's two
coil system works great. New questions
1. The tuning of the system is much broader
than any TC that I have ever built. There is
little difference in spark length when adding
or subtracting two or three turns to the
primary. Is this typical of DRSSTCs? Per
JAVATC the coupling is between .18 and .2. The
resonant frequency seems to hold pretty steady
at 285khz regardless of the turns in the primary.
2. Doubling the tank cap size definitely
lowers the resonant frequency and the input
current goes up dramatically but there is
little effect on the spark length and the
primary turns still seem to have minor effect
on the spark length up to a certain point. Are
others seeing the very broad tuning that I seem to be getting.
So far I am only inputting 60vac to the full
wave dc bridge and spark length is approaching
12". The secondary is only 18.5" long. I am
leery of increasing the input voltage until I
understand this apparent broad tuning.
Any comments would be appreciated. Thanks
Steve and everyone for the feedback help.
Skip