From: boris petkovic
Date: Wed, 27 Dec 2000 09:53:18 -0800 (PST)
Subject: Re: [TSSP] early idle testing
> > > Have you ever measured phase shifts between sine > wave > > voltages of the signal generator and the wave of > the > > top of a high Q coil driven in Fo CW mode? > > What tssp CW simultor can say about these shifts? > > Exactly at Fo, the base drive voltage is in phase > with the base > current, which in turn is 90 deg from the top > voltage, so > the top voltage is 90 deg out of phase with the base > voltage. --- I assume you're describing CW simulator results here,yes? ---- > > This phase difference continues for a short distance > into > the coil before the uniform-phase voltage > distribution of > the free resonance takes over. ---- You're refering to the case of a usual-way positioned grounded resonator against ground plane (non-uniform Cexternal function)? ---- > > A rapid phase change takes place within that short > distance, --- Answer to my previous question is obvious now. ----- > the distance being roughly a fraction 1/sqrt(Q) of > the coil > length. ---- This is a very intersting note. --- > Use of high Q secondaries means that I can ignore > this > artifact of the base drive and assume, for the > purposes of > calculating equivalent reactances, that the uniform > phase > of the free resonance still applies to a good > approximation. > > -- Msms of even very high Q coils show that there is small,but not negligible declination from 90 deg rule between bottom and top voltages. Few degrees allmost always. I must think carefuly what does this mean. Thanks for your (very quick indeed) answers Paul. Keep doin' great job. We will 'solve' this and many other things with TSSP as it progresses. Very best to All in 2001.-the year of Tesla Odissey , Regards, Boris __________________________________________________ Do You Yahoo!? Yahoo! Shopping - Thousands of Stores. Millions of Products. http://shopping.yahoo.com/
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.