I cannot say exactly, as I measured it as 59 Hz. VA7OJ measured it as 60 Hz. I was using an HP lab supply, and Adam was using some other lab supply. I put a 500 uF capacitor across the Vcc pin and it had no effect. I don't think it has anything to do with the power supply since both of us saw the same thing. If an attachment will go through this reflector, I can post a spectrum analyzer screen shot.
-----Original Message----- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of jimlux Sent: Saturday, February 27, 2016 12:07 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Inside a CTS 1960017 OCXO On 2/27/16 9:35 AM, Rob Sherwood. wrote: > Hi Dan, > > I purchased two of these, and VA7OJ one. One of mine is defective, and the > seller is going to replace it. What was disappointing was all the spurious > at 60 Hz intervals relatively close-in to the 10 MHz carrier. I suppose if > all one wants is a reasonably accurate 10 MHz, then they work OK. My good > one and Adam's unit were 1x10^7 low in frequency once warmed up, and there > are pins for frequency adjustment and sync to another standard. However if > one wanted it for an oscillator with good close-in phase noise, the spurs > ruin that hope. > > Do you know if there is a chopper at 60 Hz that runs the proportional oven > that is the source of all the spurious? > Is it right at line frequency, or is it "close" to 60 Hz? _______________________________________________ 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. -- If this email is spam, report it to https://support.onlymyemail.com/view/report_spam/ODExMjI6MTg1NzM3NjQ1Mzpyb2JAbmMwYi5jb206ZGVsaXZlcmVk _______________________________________________ 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.
