[time-nuts] Real YIG data was: YIG oscillator drift question
Antonio, when I read the question I went into my cellar to return with an AVANTEK 2-4 GHz YIG that I had once moved out of a defective spectrum analyzer. I used an analogue regulated power supply for the oscillator power and my HP6632 in constant current mode (this YIG NEEDS a tuning current) to supply a tuning current of app. 125 mA. Before starting the measurements I let it warm up for a day or so. Then I recorded temperature with a PT100 measured with A HP3457A in four wire mode and frequency with my U6200A counter (referenced to my Z3805) using my EZGPIB utility. You can download the results from my download page http://ulrich-bangert.de/html/downloads.html Look at the bottom for YIG Data. Note that the .zip contains a configuration file for my PLOTTER utility so that looking at the data is a snap with it. Just take care that the Overide binary data Graphic settings in the File menu is disabled and Open the file. While it is surely not comparable to even the worst Xtal it is not as bad as has been reported here from Bob. 73s and Best regards Ulrich Bangert, DF6JB -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von iov...@inwind.it Gesendet: Samstag, 8. Dezember 2012 15:18 An: time-nuts@febo.com Betreff: [time-nuts] YIG oscillator drift question Does anybody have direct experience on playing with YIG oscillators? I have read some specs on drift, but I know they are usually worst cases. I would like to get a raw idea about real measured drifts in reasonably stable temperature for a free running YIG with no tuning current. Yes, of course this depends on make, model etc, but any advise would be appreciated.Thanks in advance,Antonio I8IOV ___ 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.
Re: [time-nuts] Real YIG data was: YIG oscillator drift question
Neat data set! This says a lot about the stability of your HP supply. The choice of current-sense element makes a big difference in a YIG driver circuit, and most wirewound resistors fall into the Don't ask category. Would be interesting to try the same test with one of the cheap Chinese power supplies that use generic cement-encapsulated resistors. -- john, KE5FX -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts- boun...@febo.com] On Behalf Of Ulrich Bangert Sent: Tuesday, December 11, 2012 5:52 AM To: iov...@inwind.it; 'Discussion of precise time and frequency measurement' Subject: [time-nuts] Real YIG data was: YIG oscillator drift question Antonio, when I read the question I went into my cellar to return with an AVANTEK 2- 4 GHz YIG that I had once moved out of a defective spectrum analyzer. I used an analogue regulated power supply for the oscillator power and my HP6632 in constant current mode (this YIG NEEDS a tuning current) to supply a tuning current of app. 125 mA. Before starting the measurements I let it warm up for a day or so. Then I recorded temperature with a PT100 measured with A HP3457A in four wire mode and frequency with my U6200A counter (referenced to my Z3805) using my EZGPIB utility. You can download the results from my download page http://ulrich-bangert.de/html/downloads.html Look at the bottom for YIG Data. Note that the .zip contains a configuration file for my PLOTTER utility so that looking at the data is a snap with it. Just take care that the Overide binary data Graphic settings in the File menu is disabled and Open the file. While it is surely not comparable to even the worst Xtal it is not as bad as has been reported here from Bob. 73s and Best regards Ulrich Bangert, DF6JB -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von iov...@inwind.it Gesendet: Samstag, 8. Dezember 2012 15:18 An: time-nuts@febo.com Betreff: [time-nuts] YIG oscillator drift question Does anybody have direct experience on playing with YIG oscillators? I have read some specs on drift, but I know they are usually worst cases. I would like to get a raw idea about real measured drifts in reasonably stable temperature for a free running YIG with no tuning current. Yes, of course this depends on make, model etc, but any advise would be appreciated.Thanks in advance,Antonio I8IOV ___ 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. ___ 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.
Re: [time-nuts] Real YIG data was: YIG oscillator drift question
There are also YIG synthesizers available on epay, see eg 140894282834 Don John Miles Neat data set! This says a lot about the stability of your HP supply. The choice of current-sense element makes a big difference in a YIG driver circuit, and most wirewound resistors fall into the Don't ask category. Would be interesting to try the same test with one of the cheap Chinese power supplies that use generic cement-encapsulated resistors. -- john, KE5FX -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts- boun...@febo.com] On Behalf Of Ulrich Bangert Sent: Tuesday, December 11, 2012 5:52 AM To: iov...@inwind.it; 'Discussion of precise time and frequency measurement' Subject: [time-nuts] Real YIG data was: YIG oscillator drift question Antonio, when I read the question I went into my cellar to return with an AVANTEK 2- 4 GHz YIG that I had once moved out of a defective spectrum analyzer. I used an analogue regulated power supply for the oscillator power and my HP6632 in constant current mode (this YIG NEEDS a tuning current) to supply a tuning current of app. 125 mA. Before starting the measurements I let it warm up for a day or so. Then I recorded temperature with a PT100 measured with A HP3457A in four wire mode and frequency with my U6200A counter (referenced to my Z3805) using my EZGPIB utility. You can download the results from my download page http://ulrich-bangert.de/html/downloads.html Look at the bottom for YIG Data. Note that the .zip contains a configuration file for my PLOTTER utility so that looking at the data is a snap with it. Just take care that the Overide binary data Graphic settings in the File menu is disabled and Open the file. While it is surely not comparable to even the worst Xtal it is not as bad as has been reported here from Bob. 73s and Best regards Ulrich Bangert, DF6JB -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von iov...@inwind.it Gesendet: Samstag, 8. Dezember 2012 15:18 An: time-nuts@febo.com Betreff: [time-nuts] YIG oscillator drift question Does anybody have direct experience on playing with YIG oscillators? I have read some specs on drift, but I know they are usually worst cases. I would like to get a raw idea about real measured drifts in reasonably stable temperature for a free running YIG with no tuning current. Yes, of course this depends on make, model etc, but any advise would be appreciated.Thanks in advance,Antonio I8IOV ___ 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. ___ 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. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com ___ 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.
