Original poster: Terrell Fritz <terrellfone@xxxxxxxxxxxxxxxxxxxxxxx> At 12:07 AM 1/10/2007, you wrote:
Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx> At 05:56 PM 1/9/2007, you wrote:Original poster: "Gav D" <gdingley@xxxxxxxxx> Hi Ed, Jim, Mike thanks for that information, I will alter my PSpice simulation accordingly. Were either of you able to measure the Q directly, i.e. before breakout occurs during operation? I have attempted this by recording the waveform digitally and performing an FFT, but I think in the end I was just testing the effectiveness of the FFT! I should resort to more analogue methods, and suggestions/ideas?Terry did some of those measurements, gosh, 5-10 years ago. He put a secondary out in the garage and pinged it with an impulse and digitized the waveform to measure Q variations with temperature and humidity. Maybe he'll pipe up with a pointer to the data.
Hi, Here is the link, http://www.abelian.demon.co.uk/tssp/qvar070402/ Cheers, Terry