[time-nuts] FE-5680A Mechanical Question
Bob Camp
lists at rtty.us
Fri Jan 13 17:20:11 UTC 2012
Hi
One way of looking at that:
Back in 2003 or 2004 it left the factory exactly on frequency with a "zero"
setting. (I'm betting there's a factory calibration register in there ..).
You fire it up in seven years later and it's moved 5x10^-11. More or less
it's drifted < 1x10^-11 per year. Comes out to about 6x10^-13 per month.
That's all based on a *lot* of wild guesses.
Bob
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of EWKehren at aol.com
Sent: Thursday, January 12, 2012 6:58 PM
To: time-nuts at febo.com
Subject: Re: [time-nuts] FE-5680A Mechanical Question
Nigel
I did not program it, it had its original setting and it is 9.99999999944
which is -5.6 E-11, within 10 MHz which is within spec. Once I have some
aging I will look at Voltage sensetivity.
Bert Kehren
In a message dated 1/12/2012 6:22:02 P.M. Eastern Standard Time,
GandalfG8 at aol.com writes:
Hi Bert
Could you clarify something for me please, before you started your tests
did you program the unit to be close to 10MHz or did you leave it as
received, and if so what is the actual frequency and is it stable?
regards
Nigel
GM8PZR
In a message dated 12/01/2012 21:50:28 GMT Standard Time, EWKehren at aol.com
writes:
I hear all these ideas from paper tigers. How about building something
and
report on it. I can do a Shera for $ 40 and add a $ 20 GPS. And it
works.
I did fail to mention that I also have retrace data. Over the test period
I
had at least 10 power outages from seconds to a couple of hours. The Rb
goes right back to 1 E-12. It would be nice if some one independent does
a
test on aging, maybe I was lucky and got a particularly good unit.
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