Re: tuning

To: tesla-at-pupman-dot-com
Subject: Re: tuning
From: "John H. Couture" <couturejh-at-worldnet.att-dot-net>
Date: Wed, 8 Jan 1997 07:16:08 +0000
Subscriber: couturejh-at-worldnet.att-dot-net Wed Jan 8 20:27:20 1997

At 05:12 AM 1/7/97 +0000, you wrote:
>> > > > Subject: magnifiers

>> > Subject: Re: magnifiers
>
>Subscriber: mwade-at-aros-dot-net Mon Jan  6 21:51:54 1997
>Date: Sun, 05 Jan 1997 22:21:12 -0800
>From: MIKE WADE <mwade-at-aros-dot-net>
>To: tesla-at-pupman-dot-com
>Subject: Re: tuning
>

>> 
>> Subscriber: bert.hickman-at-aquila-dot-com Fri Jan  3 22:09:52 1997
>> Date: Fri, 03 Jan 1997 09:58:10 -0800
>> From: Bert Hickman <bert.hickman-at-aquila-dot-com>
>> To: tesla-at-pupman-dot-com
>> Subject: Re: magnifiers
>> 
>> 
>> >
>> > Tesla List wrote:
>
>--------------------- Big snip
>>>> 
>> Mike,
>> 
>> Thanks for the additional info.
>> 
>> General comments:
>> The first problem I see is that your 12 KV 30 MA neon is heavily
>> overloaded by the tank cap. This transformer is optimally sized for
>> about 0.0066 uF, and could drive up to 0.01 uF - but 0.0275 uF is much
>> too big. Based upon the size of your secondary, toroid, and primary it
>
>> 
>> -- Bert --
>
-------------------------  Big snip


>Mike

Bert is correct when he says you should use a smaller cap with a 12 KV 30 ma
360 watt neon transformer. However, he did not indicate how this size cap is
determined. One way to calculate this cap is as follows. The efficiency is
assumed to be about 50% with 120 breaks.

      C = 2*W*eff/((1.4*V)^2*bks)
        = 2*360*.5/((1.4*12000)^2*120)
        = 1.06 *10^-8 farads
        = .01 uf

Increasing the wattage requires an increase in the cap plus other changes as
Bert mentioned.

Jack C.