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Re: [TCML] Dual identical FRANCE neon sign transformers (15000v 60mA each) in parallel
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Re: [TCML] Dual identical FRANCE neon sign transformers (15000v 60mA each) in parallel
Hi Timothy,
Yurtle Turtle wrote:
100 nF sounds a little high for 120 ma. That's what I use for 25 kVA.
...and I concur with what he says.
Please have a look at the MMC table on Bart Anderson's site:
http://www.classictesla.com/download/mmc_cap_chart.pdf
You will note, that an LTR cap for i.e. a 15kV/120mA NST, with 120BPS
SRSG is
C=54.5nF. You will probably not be able to charge a 100nF cap high
enough
for producing big sparks.(This is for 60Hz line f)
Perhaps you have already studied Ritchie Burnetts super-TC site:
http://www.richieburnett.co.uk/tesla.shtml
... if not: I highly recommend it. Choosing the right cap is not that
simple,
and there exist different ways to accommodate to the actual situation.
Regards, Kurt
-----Ursprüngliche Nachricht-----
From: Timothy Gilmore
Sent: Monday, March 02, 2015 8:18 PM
To: mddeming@xxxxxxx ; Tesla Coil Mailing List
Subject: Re: [TCML] Dual identical FRANCE neon sign transformers (15000v
60mA each) in parallel
I was able to win on eBay a nice 6"x30" secondary (1400 turns 24 gauge)
so
I think I'm set here. I also made a toroid from 6" aluminum dryer
ducting
with a 24" total diameter. It's not 30" like the secondary winding but
should have good results with a grounding ring above the primary copper
tubing.
All that's left is capacitance as I'll probably need about 100 nF to
keep
the primary taping under 12 turns otherwise I'll need to add more copper
tube windings on the primary. And finally some sort of a spark gap with
fan
and upgrade to something fancy later on.
Tim
<snip>
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