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Re: xmfr and cap question ?
Original poster: Mike <megavolts61@xxxxxxxxx>
To size the cap, use the mains frequency, then multiply it by
1.3 - 1.5 to keep the voltage stress off the secondary windings of
your NST(along with a Terry filter). I"m not sure where you got the
20Hz in your second calculation. The 4.2nF cap would be resonant for
your NST, so I'd suggest about a 5.5nF cap for your tank circuit.
A quick thanks to everyone who's responded to my questions of late,
I have another though .. I've noticed there is a thread regards
calculating the Cap size need. When I original sized the cap I used
mains line freq of 50Hz however I've noticed that others have used the
secondary sides freq ?? and I'm a tad unclear as to which side to use?
I've made the following calculations
(Primary Side) 15Kv @ 20ma @ 50Hz = 0.0042uF
(Secondary Side) 15Kv @ 20ma @ 20Hz = 0.0106uF
I did the original calculations using TeslaCAD and Deepfriedneon both
which indicated I use the mains freq, could someone put my mind at rest
on which freq I should be using ??
Cheers and many thanks
stiff? Loosen up...
and play hundreds of games for free on Yahoo! Games.