[time-nuts] Real YIG data was: YIG oscillator drift question

Don Latham djl at montana.com
Tue Dec 11 19:54:45 UTC 2012


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-bounces at febo.com [mailto:time-nuts-
>> bounces at febo.com] On Behalf Of Ulrich Bangert
>> Sent: Tuesday, December 11, 2012 5:52 AM
>> To: iovane at 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-bounces at febo.com
>> > [mailto:time-nuts-bounces at febo.com] Im Auftrag von iovane at inwind.it
>> > Gesendet: Samstag, 8. Dezember 2012 15:18
>> > An: time-nuts at 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
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>>
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-- 
"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





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