From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: SIZE of RF chokes?
Date: Sat, 19 Nov 2005 17:56:36 -0700
Original poster: FutureT@xxxxxxx
In a message dated 11/19/05 5:25:50 PM Eastern Standard Time,
tesla@xxxxxxxxxx writes:
You said:
"You may be pleased to hear that my TT-42 coil which gives 42"
sparks from a 12/30 NST, does not use any filter. I just use
safety gaps."
42 inches cant be correct. According to
the......universal......sparklength formula, you should only get a
max of 37" ( 1.7*sqrt inputpower ) in watts )
I happen to be the guy who created that formula. I use 140 volts
into the NST. This permits the NST to draw more than it's rated
power. Besides the formula is a guide, not an absolute limit.
By the way now I hate your guts, considering you're using the exact
same transformer as I, but getting.......3 times more power coming
out. I dont realllly hate you but...you get the idea
Ho, ho, I see what you're saying. We'll I'm sure you'll obtain the
performance and safety you're looking for.
With my current system in place, I get 9 to 11 inch discharges to the
air, and when i add a breakout point, pointed at a grounded rod - I
can stretch it to 15.5 inches
thats a total efficiency of about 50%
OK, but using just a safety gap is BS, i saw your site dude. You use
a terry filter. NOt to mention, just because your coil performs good,
doesnt mean it will last forever. I am very happy with 15" discharges
if I could get my coil to last..... 5 or more years. I care less about power.
You're telling me that I use a terry filter? How could you come to that
conclusion? It is a false statement. I don't use any filter on that coil.
It's true my coil may not last as long as it would with a filter. If you're
concerned more about having the coil last a long time and don't
care about getting the longest sparks, that is fine. A filter
won't hurt the performance too much anyway. I'm not telling
you that you should avoid the filter. Filters are fine and very
protective. I was just mentioning that I don't use a filter.
Please don't send me any photos, although I appreciate the
offer. I just don't have time....overloaded by emails already.
John