Hi Douglas,
douglas smith wrote:
i was wondering 2 things
first, i have recenty run accross a 35 kv .03 uf pulse capacitor
for 99.00
would it be better to use one like this or to use mmc combination ?
not sure but looks to me that it will cost about the same.please
correct me if i'm wrong.
target cap .03uf
If the pulse cap is rated for the pulse rate of the gap, then it may
be fine. You might want to let the list know about any specs you can
find out about. My opinion is both pulse and mmc's are equivalent if
both are rated for the pulse rate (I use both). One thing about MMC's
is if a cap fails, replacement costs is low. Not so with a pulse cap.
For a .03uF cap size (nice and large), I personally would go after a
pulse cap string (like three .01uF in parallel). But, $99 is hard to
beat and a heck of a price if it's worthy of Tesla duty.
secondly, as for spark length on javatc i get the same results
with a nst 7.5/60 as i do
with a 15/30
please explain
Spark length is based on John Freau's power equation which is 1.7 x
sqrt(input power). Because the power for both transformers is 450W,
the spark length comes out the same. Also, this spark length is based
on 120 bps and considered optimum. This is the spark length listed in
the Transformer Power Section. There are two other spark length values
(one in the static section and one in the rsg section). These spark
length values are similar and based on power, but also includes bps,
power across the gap, etc.. In some cases it's less than the JF
equation and in some cases greater. I usually look at these
personally. The main thing to remember is that all do not account for
variations in gap efficiency. Those losses can be huge and directly
affects actual spark length.
Take care,
Bart
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