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Re: 1/4 wave TC (fwd)
---------- Forwarded message ----------
Date: Sat, 28 Jul 2007 08:48:53 -0400
From: Dave Pierson <davep@xxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 1/4 wave TC (fwd)
>>A long time ago I saw the Corums use a wavguide that was 1/4 wave long
>>as a Tesla Coil. It worked.
That i did not see. I did hear them describe a student exercise,
using 160MHz(ish) and a 1/4 wave whip, as "CW Tesla coil", with 'intense
discharge' from top. Described in one of th olde Tesla Con proceedings,
which I have, buried somewhere.
>> It had no termination and it produced a discharge.
>> Why not a TC with no top load?
Depends on the purpose.
Indications are that a 'working' Tesla Tesla coil would NOT have
'spit sparks', but used a big enough top load that no breakout
would occur. (Having said that, spoilsport disclaimer: I remain
unconvinced that such a coil would be useful for what Tesla
seemed to be intending.)
My reading of the 'must use top load' advice was that this makes things
a lot more predictable/controllable.
> What was the wavelength the Corums used, what was the power, and
>where and and how big was the arc? As for a TC without top load, we all
>have built them at one time or another - haven't you? Of course, if one's
>objective is long stramers, coils with top loads of some sort or another
>work much better.
My understanding is that streamer length will increase with increasing
top load radius, up to some limit, depending on temp/humidity, etc,
varying with coil tuning/retuning.
'all' this follows well established electrical 'rules'.