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Re: power vs. toroid size

Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>


Use a 4.5 h/d ratio for good performance.  With a given dia this will give
you the correct length for the winding.  Divide this winding length by 1,400
turns to provide the correct wire dia. from which you can look up in the
wire charts the correct AWG to use.

If you are running NST then a 4 or 6 inch dia will give good performance at
30 mA.  Use 8 to 10 inch PVC pipe for a 60 mA NST.  If running a pole xmfr
then use 16-24 inch dia for good performance.

Min. toroid size should be twice sec coilform dia.  Even better performance
with 3-4 x the sec coilform dia, however the toroid cost gets expensive when
the sec gets large.

If you contact me off-list I can send you some digital photos of how we
constructed our large 10 ft x 30 inch dia toroid using mesh wire and

Dr. Resonance ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx> To: <tesla@xxxxxxxxxx> Sent: Wednesday, March 30, 2005 8:22 PM Subject: power vs. toroid size

> Original poster: Skip Greiner <sgreiner@xxxxxxxxx> > > I suspect that this subject may have been discussed before but I have been > unable to locate info in the archives. > Has work been done to determine the minimum power input to a TC to drive a > given sized toroid to breakout? I under stand that there are many factors > that might affect breakout including the roughness of the toroid surface, > humidity, etc. But I would think that, assuming some reasonable efficiency, > there should be some relational ship between power input and the ability to > get breakout from the toroid. I would think that when designing a new TC, > one would have to take into consideration the possible sizes for the toroid > when setting the parameters for the secondary. Any comments would be > appreciated. > Skip > > >