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
tuning
range.
John WA4WDL
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From: iov...@inwind.it
Sent: Saturday, December 08, 2012 9:17 AM
To: time-nuts@febo.com
Subject: [time-nuts] YIG oscillator drift question
Does anybody have direct experience on playing with YIG oscillators? I
have read
Hi
If you have a magnetic field, the net TC will depend on the core material in
the magnet. That can be a that depends sort of thing. The high perm materials
are often strange over temperature. I suspect the only real answer will be to
measure the one you have in your environment.
Bob
On
I do not have any data on temperature drift, but I can say that most YIG
oscillators I have used, with the exception of the Stellex-mini models, have
required a tuning current to oscillate. The Stellex-mini models have a
strong bias magnet which allows the tuning current to be zero at mid
Yes, something must supply the minimum magnetic field to activate the
oscillator - but the current determines the field, so it's
necessarily part of the drift characteristic. It also depends on
whether the YIG sphere is heated - usually to 80 deg C or so, to help
stabilize it.
Without any
Yes, something must supply the minimum magnetic field to activate the
oscillator - but the current determines the field, so it's
necessarily part of the drift characteristic. It also depends on
whether the YIG sphere is heated - usually to 80 deg C or so, to help
stabilize it.
Without any
Another thing you should be aware of is that they have quite a bit of
hysteresis - so even with the same tuning current the output frequency
might differ by several MHz depending on whether you approached that
setpoint from above or below. The YIG sphere also has a substantial
temperature
