From: mystuffs@orwell.net (Metlicka Marc)
Date: Wed, 13 Jun 2001 20:40:47 -0400
Subject: Re: [TSSP] former materials
paul, the former materials for my two out of norm coils are and may be a problem because i wrap a layer of polypropylene box tape around them upside down to hold the wire, but: 3k coil-- .091" thick sona tube, no poly top coat, only insulating varnish 10-1 coil is .100" thick pvc drain pipe, insulating varnish also: "Really I'm trying to find some h/d < 1.5 coils that can be compared with the model on the basis of the geometry alone. Which means a coil with a minimal former yet maintaining good shape!" the fiberglass tanks i have are spun glass fiber impregnated with polyurethane resin, they are .100" thick, very uniform, and sturdy. if anyone wishes to wind the taped coil that you asked for, i will send them whatever size they wish. if this sounds suitable? i would be happy to wind it, but i feel there are others that could get the current measurements better then i. the light bulb idea for topload measurements is looking somewhat promising, the frequency DOES make more plasma inside the bulb the higher it is, but the breakthrough voltage for the glass seems constant. the question is: how much voltage is being drained in the plasma production? how much does the bulb itself effect the e-field of the topload? anywise, still working on it. as far as the "bouncing of a laser beam" off of a working coil for vibration measurements goes: i've been looking at an inexpensive digital photometer. this says it is also used for demodulating optical signals for audio applications. how does this approach sound: check level of the raw laser beam, check level of the beam bounced of a non powered coil then check level of the operating coil? maybe someone on the project has access of one to try, but i will probably get one soon. that's about it for now, marc
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.