Re: Wire length,resonance, and Q (fwd)

• To: tesla-at-pupman-dot-com
• Subject: Re: Wire length,resonance, and Q (fwd)
• From: Tesla List <mod1-at-pupman-dot-com>
• Date: Tue, 12 May 1998 21:42:03 -0600 (MDT)
• Approved: mod1-at-pupman-dot-com

---------- Forwarded message ----------
Date: Tue, 12 May 1998 19:36:39 -0700 (PDT)
From: "Edward V. Phillips" <ed-at-alumni.caltech.edu>
To: tesla-at-pupman-dot-com
Subject: Re:  Wire length,resonance, and Q

"
Why then, do long space wound coils resonate at a frequency higher
than expected? This has nothing to do with the LC ratio either. I would
expect that no matter what gain or reduction of L vs C for a given
geometry, they should always result in a frequecy lower than that of
a straight wire.  Whats going on here???"

	Perhaps the explanation is that the coils are being excited
at an odd harmonic of their fundamental resonant frequency.  Have
seen an example of this published somewhere (TCBA News?) where thge
the voltage distribution along the coil was explored with a neon
tube (or fluorescent lamp?), with a couple of nodes along the coil
indicating the harmonic response.

Ed

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