From: Paul
Date: Fri, 17 May 2002 18:52:21 +0100
Subject: Re: [TSSP] Topload breakout potentials
Just catching up on a backlog of emails... Bart wrote: > I thought you had the coil up around 26kv/cm after the surface > gradient doubling error or was that prior to the 12% differential? Yes, because I'd put in your walls at 60", which gave an Fsec 5% lower than reality, therefore appeared only 6% detuned, thus higher voltage. I had to remove your walls and ceiling completely (sorry!) in order to match your measured Fsec. With John's coils, I had to bring the walls in a little way from my initial guess. I think your wooden walls are more or less invisible to your coil, whereas John's walls must be more effective as terminators of the E-field. Bet your coil struggles to work in the garage when it's rained within the last hour or few? > for secondary base current ... would I need a high Fr current > transformer? Oh yes. But you could knock one together easy enough, and calibrate it with a signal geny and scope. > Modes scoped w/signal across gap (all kHz): 35.4, 69.8, 119.7, 414. Damned if I can account for that spectrum. Were they with the toroid at 77"? We would be expecting the frequencies in http://www.abelian.demon.co.uk/tssp/cmod/ba0.modes.gif If your frequencies are correct, then we're wandering around without a map or compass... > Regarding the coupled mode frequency's. Should I be doing this with > everything hooked up and gap shorted? Yes. Be careful how you inject the signal generator into the primary, if that's how you're working it - watch out for series inductance being added by the geny output Z. -- Paul Nicholson, --
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.