[time-nuts] FE-5680A Mechanical Question

Bob Camp lists at rtty.us
Fri Jan 13 12:20:11 EST 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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