From: Paul
Date: Sun, 24 Mar 2002 06:19:03 +0000
Subject: Re: Ready :-)) - Re: [TSSP] short H/D and stuff
Hi Terry. Yawn! Why do I always seem to get up at the crack of dawn on a Sunday - Oh, I remember - It's my favourite day!! > The short tapped secondary is finished. It looks great! This ought to work really well, and should produce results on a par with your NSVPI success. > So let me know what size of resistance(s) I should use and > I can ping it at each level. Ah, I see. You plan to move a resistor along the coil and ping the coil at each position. Ok, that ought to work reasonably well now that we have an accurate Q measurement method... Select a single resistor which roughly halves the Q factor. > It is all ready to go. Yup, and the program is about ready too. Here is the output for 3-23 raw: PEAK FREQUENCY Q FACTOR AMPLITUDE 1 229931 kHz +/-0.01%,11 Hz 463.32 +/-4.53%,21.0 98.0% -0.2dB 2 578079 kHz +/-0.02%,96 Hz 183.92 +/-1.65%,3.0 13.9% -17.1dB Reconstituted 99.0% of input signal and from 3-23 avg-16: The Q factor of this coil is phenomenal! Would make a fantastic CW coil!! PEAK FREQUENCY Q FACTOR AMPLITUDE 1 229931 kHz +/-0.01%,11 Hz 462.74 +/-4.53%,21.0 98.3% -0.1dB 2 578117 kHz +/-0.02%,96 Hz 184.17 +/-0.29%,0.5 13.8% -17.2dB Reconstituted 99.2% of input signal I'll model the coil today and send the results along later - I guess you're heading for bed now? -- Paul Nicholson, --
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.