Re: OLTC update - Poor seconadry Q

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Terry,

Tesla list wrote:

> Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
>
> So... I don't know if it is the SonoTube, surroundings, proximity effects,
> plastic wrap coating...  Have to test some things...  A small chance it
> could be the anti-parallel diodes...

I think none of the above, but rather the secondary itself. I would bet the Q
of the secondary by itself is pretty low.

> Of course, ideas on how I can fix this are more than welcome :-))

Rewind a secondary with less turns and larger wire. Fres will tripple (not sure
how tied into 0.47uF you are with the IGBT current). Of course, with all the
work you put into this project already, I hope it's something else.

BTW, if you were to model the secondary in JavaTC (since it was mentioned in
another post), here are the input parameters for your coil:

Sec Diam = 10.75
Sec Length = 41
Bare Wire Diam = 0.0126
Insulation = 0.001
Spacing = 0.000255
Toroid Major = 24
Toroid Minor = 6.5
Sphere Diam = 0
Top Load Reduction = 36.3

Here are some of the main outputs JavaTC identifies:
DC Resistance = 507.53 ohms
Inductance = 480.13 mH
Self Fres = 52.4 kHz
Skin depth = 0.014 inch
Loaded Fres = 38.21 kHz
Total Capacitance = 36.14pF

Take care,
Bart

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