Re: [TCML] Re: Stacked Toroids

[mark olson <kc5gym@xxxxxxx>]

At 03:24 AM 1/15/08 -0800, you wrote:
> What worked well for me is a 5 gallon bucket. I simply
> cut the bottom off and placed it between my 6x24 and
> my 8x34. I'd like to experiment with raising it more,
> but am limited by garage door height. I plan on
> covering the bucket with aluminum tape, but currently
> have the two toroids connected with copper strap.
>
> Adam

> All,
>
> So far, the responses have addressed spacing of the toroid stack only.  But
> from the way the original question was worded (see below), I believe Phillip
> plans to use a metal spacer and that is why he asks about the diameter of
> the spacer.  My engineering judgment says the largest diameter metal
> cylinder between the two toroids will contribute the most capacitance.
> Anyone see a problem with that?
>
> --Steve Y.


> Yes, the larger the cylinder the greater it's capacitance contribution. 
> Regardless, it's a very small change in C. If his upper toroid was 20" 
> above the bottom and he used a 16" cylinder between the two, Ctop would 
> only increase by 1pF as compared to not using a cylinder at all. 
> Surprising maybe but true.
>
> I think a cylinder as wide as practical is good. His smaller toroid has an 
> 8" center hold. Throw in a center disc and use it for mounting an 8" 
> cylinder. 8" is likely the largest practical size to use. He could go 
> larger but then he would have to figure out a way to mount the cylinder 
> onto the bottom toroid and that would be difficult (with nothing is gained 
> electrically).
>
> Take care,
> Bart


I have been walking around all day looking at things,  one pint paint cans, 
one quart paint cans, one gallon paint cans,
 two  & half gallon thinner cans, five gallon thinner cans,  .... No I am 
not a painter...

Javatc doesn't show much change in cylinders adding capacitance, but I have 
noticed a "glitch" in it in this regard.
can't put my finger on  it yet.

sincerely,
Marko 

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