Thank you Bob,
I think I'll get it, just to have another quality oscillator. About its
aging I think it is new, probably a spare unit. since there are not
signs of any solder on the pins.
Best regards,
Ignacio
El 14/01/2011 18:11, Bob Camp escribió:
Hi
The 105 oscillator is a nice OCXO. I certainly would not throw one away.
There are indeed better parts out there. It all depends on what you are
trying to do.
The phase noise of the unit is not as good as some of the 10 MHz stuff. I
would not base a microwave synthesizer on one. It's short term stability is
a "depends on the one you have". Testing would be needed here. Aging wise it
should be pretty good. That assumes it was on power for a good part of it's
life. If it's been on the shelf for 20 years, you may need to run it for a
while ...
Bob
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of EB4APL
Sent: Friday, January 14, 2011 10:05 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] CS reservoir depletion
Hi,
I can get a 00105-6013 xtal oscillator that is the type used in the
5051A and 5065 standards. Does it worth for a standalone frequency
standard or the more modern compact types such the miniature units from
the telco towers salvage coming from China are more convenient?
I realize that I need to provide both with a low noise power supply,
specially for the frequency control voltage, but the in modern ones the
supply issue is simpler and they give the (usually) more convenient 10
MHz output instead of 5 MHz. I don't know if the HP unit is usually
quieter or more stable.
I also I know that it depends of the intended use. In this case it is
for my home lab which includes a compact Rb and a soon to be built GPSDO.
Regards,
Ignacio, EB4APL
El 14/01/2011 7:01, Tom Van Baak wrote:
Hi Tom been quite a while hope you are well.
The never run out comments, not from me. Look at the
previous thread I tagged onto. My humor is that most of
the CS tubes we get are very long in the tooth usually
way past whatever anyone would say they are good for.
That is so true. It always amazes to pick up a 30 year old
5061A and find that it still works. Sometimes the reason is
that it is already on its 2nd or 3rd replacement tube before
it went to surplus. In which case you're happy for years.
Other times it may be that the 5061A was used only very
intermittently and the tube is the low S/N original.
A real gem would be one that was kept in cs-off mode except
for a few hours once a month to keep the OCXO within some
loose cal lab spec. Even after decades it would be as good
as new.
For many frequency applications there is no reason to run
in full cs-locked mode. This is also true if you need good
short-term stability. The free-running OCXO in most Cs (and
GPSDO for that matter) are more stable short-term when the
loop is open.
/tvb
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