[time-nuts] 5680A update
EWKehren at aol.com
EWKehren at aol.com
Thu Jan 19 06:19:19 EST 2012
MV89 may not be the best, I have better, but specs say 2 E-12 for 1 second
and tests have shown they consistently brake the 1 E-12 barrier at 1
second. The reason I mention it is it's cost. With unlimited funds many things
are possible but my challenge is lowest cost. That is why I started this
probably longest discussion when I pointed out the ridiculously low price of
the FE 5680A.
The MV89 fits in the same category. It's price / performance is
Right now work is on hold because I will not touch the unit on aging test,
but a second one is on order. I have the tendency to squeeze 10 pounds of
shxx in a one pound box and this time not different. I have selected the
enclosure and have designed the thermal portion, goal is in stage one to
combine a MV89 with an analog filter with the 5680 and match through AV
measurements. Second stage is combining the unit with a Shera controller to a GPS.
I plan on documenting the steps and share with the list. It will be a slow
process since metal work is involved.
In a message dated 1/18/2012 11:48:43 P.M. Eastern Standard Time,
albertson.chris at gmail.com writes:
On Tue, Jan 17, 2012 at 8:13 AM, <EWKehren at aol.com> wrote:
> After eight weeks of monitoring to 1 E-12, I still se no aging. Waiting
> a change so I can do other tests. One thing I clearly se is a 4 Hz
> response changing the output by +- 3 E-11. It may be more, will have to
> find a way to check it more accurately, because of limited response
> for one will fix that problem with a Morion MV 89 and a 100 Hz analog
> New Morion's are available for less than $ 30 the ones I bought seem
> That's also where I got my 5680A
Is the MV89 the best OCXO to use as a reference? I notice there is a
place selling them for $19.99 buy it now price otis the $30 deal
I want to get setup for frequency stability measurements. I have a
t-bolt but being conservative (when it comes to engineering) I'd like
a second non-related standard and a good ocxo should work for that
over medium term tau. (I think)I don't know how the various $20 to $30
OCXOs compare. And I don't yet have means to compare them.
Redondo Beach, California
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