1/4 Wave Theories - do a test?

From:  Mad Coiler [SMTP:tesla_coiler-at-hotmail-dot-com]
Sent:  Thursday, June 04, 1998 3:41 PM
To:  tesla-at-pupman-dot-com
Subject:  Re: 1/4 Wave Theories - do a test?

>From:  Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
>Sent:  Wednesday, June 03, 1998 10:24 PM
>To:  Tesla List
>Subject:  Re: 1/4 Wave Theories - do a test?
>Hi Tristan,
>> From:  Mad Coiler [SMTP:tesla_coiler-at-hotmail-dot-com]
>> Sent:  Monday, June 01, 1998 9:45 PM
>> To:  tesla-at-pupman-dot-com
>> Subject:  Re: 1/4 Wave Theories - do a test?
>> Coilers,
>> I am not yet the most knoledgeable on the theories of the Tesla Coil 
>> (but I am getting there), but I have one idea about the 1/4 wave 
>> conflict.  Why not just do a simple test.
>>   Now - please dont jump down my throught or anything - but do tell 
>> if there is some problems with my idea.
>>   Build (if you dont have on already) a Tesla Coil that is designed 
>> that its length of wire on the secondary is equal to the 1/4 
>> This will only work if you have a larger toroid you can also run the 
>> system with. Measure the maximum spark length produced by your 1/4 
>> Tesla Coil.  Then put a larger toroid on it that brings the frequency 
>> below that of when it was equal to the 1/4 wavelength. See if spark 
>> length increases. If it does increase this could mean many things but 
>> comes down to the simple fact that it worked better than it did when 
>> was equal to the 1/4 wavelength. I know that many other factors can 
>> change but what does it really matter if you trying to get the most 
>> spark length - and one way gives you more spark?
>It matters if you are trying to determine what parameters if any are 
>affecting output. 
>>   For example, I have tried this. I have a small 3.5" diameter 
>> that has 500' of wire in it.  Running it at around 400kHz (1/4 wave 
>> equals 616') it has almost double the spark length and several times 
>> power as when I run at the 1/4 wave frequency. And yes, the coil was 
>> fully retuned for all experiments.
>OK - you must be running it with a larger terminal at the lower 
>#1 - top storage capacity is increased lowering the impedance 
>delivering energy into the output discharge. More of the energy 
>ending up in the secondary is on tap to feed the discharge in a 
>shorter time than if it had to come from the coil itself.
>#2 - if you tapped in more primary turns, primary Q is higher as gap 
>loss is reduced. This can make a very significant difference to 
>output in many systems. I noted exactly this by eliminating a source 
>of loss in a small system last night *without retuning a thing*.
>You didn't say whether spark gap settings were the same, nor did you 
>say whether you increased your primary capacitance. Be interested to 
>hear what exactly you changed.

The only thing changed is the toroid and primary tap.