Re: 1/4 wave TC (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 26 Jul 2007 15:55:09 EDT
From: Mddeming@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: 1/4 wave TC (fwd)

 
In a message dated 7/26/07 1:28:27 P.M. Eastern Daylight Time,  
tesla@xxxxxxxxxx writes:

.  Unpowered, the 
resonant frequency of the secondary with no top load is  about the same 
as the 1/4 wave frequency of the wire length in the  secondary.
.

My intention with this coil was to build a secondary  that would resonate 
at the at the 1/4 wave frequency of the wire length  used in the 
secondary. Indeed, with no top load, the overall excited  resonant 
frequency of the secondary is only slightly below the non powered  
resonant frequency


 
Hi Skip,
 
Have you considered the following:
 
1) You have made a coil whose resonant frequency has a quarter wavelength  
that is equal to the straight wire quarter wavelength, but as soon as you put  
the first bend in the wire, the "EM distance" between the two ends is no longer 
 that of the straight wire. Once you have put ~380 bends in it such that the  
straight-line distance in three dimensions from end to end is  only ~19 
inches, then that quarter wave number really seems to lose any  significance. 
 
2) As the streamers form, they drop the resonant frequency of the  secondary. 
The streamers themselves become a constantly growing and shrinking  topload, 
as they form, grow, disappear, and new ones re-grow. When there is no  other 
topload, the percentage by which the streamers affect the  frequency is 
greater. Since, when anything is happening, the frequency  is constantly changing, 
what is the relevance of the wavelength at which nothing  is happening?
 
Matt D.
 
 



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