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Re: [Fwd: Re: Capacitor search]
Tesla List wrote:
>
> >From Esondrmn-at-aol-dot-com Sat Dec 7 00:01:39 1996
> Date: Fri, 6 Dec 1996 16:52:01 -0500
> From: Esondrmn-at-aol-dot-com
> To: tesla-at-pupman-dot-com
> Subject: Re: [Fwd: Re: Capacitor search]
>
> In a message dated 96-12-06 01:37:36 EST, you write:
>
> << > Thanks, Ed Sonderman
> >
> > Ed, I did some off the cuff calcs on your numbers.
> >
> > Unloaded Resonate Frequency 908 khz
> > Unloaded Q 93.67
> > Loaded Q should be 41.63
> > Inductance 7.034 millihenry
> >
> > Isn't your inductance a bit to low for this size
> > of coil?
> >
> > D. Gowin
> >>
>
> Dan,
>
> Thanks for your help. I did mean khz - not mhz. I calculate 493 turns using
> #28 wire wound on a 3.0" dia bottle, 7.0" winding length. I assumed 97% x
> 72.7 turns per inch and then used 70.5 turns per inch in the equation. Using
> Wheelers Equation, I get 6.5 mh and unloaded frequency of 974 khz and 654 khz
> with toroid.
>
> You asked if the inductance wasn't a bit low? Can you expound on this? If
> you are going to use a wine bottle, that's what you get - unless I drop down
> in wire size to something like # 32 which should raise the inductance by
> about 50%
>
> Ed Sonderman
Ed,
That's my point, use a smaller wire. In my opinion,
anything above 8 mH with this size coil is a must. In some of
the experimental coils I've done in this size, a higher
inductance will give you better performance. This is just my
opinion though, so take it with a grain of salt.
D. Gowin