OK. Your unit still seems to put out a lot of RF. I set my scope to sweep at something like 5 sec/div turned on the oven, and manually tuned the wave meter across the band. The result as I remember (it was 20 odd years ago) I got a roughly 1/2 sine looking spectrum, the result of some thousands of cycles.
-John ========== > I ran the oven for 2 minutes while heating up a cup of water (normally > just fine for a large cup of tea :). The spectrum analyzer was on max-hold > mode at the maximum RBW (1MHz) so that was a lot of sweeps, but the > display was pretty much stable after about 30 seconds, after that, it just > filled some of the valleys. > > I do not pretend that any of that is calibrated in any way, but initially, > I thought, with the 30dB attenuation in front of the mixer, I am unlikely > to blow anything. I guess I was right, but not by much... > > Certainly, the antenna is questionable, and so is the BNC T adapter. > Antenna orientation was what it was, just moving my hand in the vicinity > caused significant shift in the amplitude response over frequency, but not > so much change in the peak value, so I did not try to optimize it. > > Didier > > >> -----Original Message----- >> From: time-nuts-boun...@febo.com >> [mailto:time-nuts-boun...@febo.com] On Behalf Of J. Forster >> Sent: Monday, January 18, 2010 7:31 PM >> To: Discussion of precise time and frequency measurement >> Subject: Re: [time-nuts] 4 KV Power Supply Recommendations >> >> I'm not really confident about your display, because the >> source is sweeping very quickly. It's probably shifting 25 to >> 50 MHz in 1/240th second. (The frequency sweep one way and >> back in 1/120th second). >> >> When I was playing w/ MOs, I used a standard gain horn, >> cavity wave meter, crystal detector, and scope. >> >> You may be getting something like aliasing between the scope >> sweep and the maggie sweep. >> >> -John >> > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.