[time-nuts] What did I buy? Austron 1210D-03

[Dan Watson]

Well the clock survived Fedex Home Delivery (yuck) in one piece. It's in
extremely good shape, just as was shown in the pictures. All the buttons
and lights work. At turn on, the 10MHz output was about 350 Hz high, and
power draw was 40 Watts. It's now setting at just over 0.1 ppm out after a
very slow warmup. Who knows when the last calibration was, or if someone
fiddled with the frequency adjustments.

Of course the batteries are deader than a doornail. They can actually keep
the clock powered on for a few seconds, which is surprising. Next step is
to open it up and get those batteries out, hopefully they haven't leaked.

I wonder who got the other one ??

Dan

On Mon, May 25, 2015 at 1:37 PM, Bob Camp <kb8tq at n1k.org> wrote:

> Hi
>
> Best guess is that you will get down below <1x10^-9 fairly soon. That will
> let you
> stay within 100 ns of GPS for a >100 second walk around the block…. It
> would be
> unusual if it stayed below 1x10^-11 for any length of time. That would
> extend your
> walk time to about three hours.
>
> As you take your walk, resist the urge to swing the arm carrying the
> clock. The (likely)
> 2x10^9 per G acceleration sensitivity will shorten your walk quite a bit
> if you do :) Of course
> you *could* calibrate the sensitivity vector and log all of the arm swings
> ….
>
> Bob
>
> > On May 25, 2015, at 12:21 PM, Dan Watson <watsondaniel3 at gmail.com>
> wrote:
> >
> > Thanks for the replies. I think this will make a very nice clock for my
> > lab, though before I relegate it to a shelf I plan to replace the battery
> > pack and experiment with the performance. I especially like the features
> > for syncing it precisely to an external source. After a month or two of
> the
> > OCXO stabilizing, I'll get it synced to GPS and see how long it stays
> > aligned. A reference aligned to the GPS PPS  that you can carry around
> > seems quite nifty.
> >
> > The other unit already sold, so perhaps that indicates the price wasn't
> far
> > off the mark.
> >
> >
> > Thanks
> >
> > Dan
> >
> > On Mon, May 25, 2015 at 12:28 AM, Glen Hoag <hoag at hiwaay.net> wrote:
> >
> >> Dan,
> >> A Google search locates a manual and schematics at <
> >> http://www.to-way.com/tf.html>.
> >>
> >> -Glen
> >>
> >> Sent from my iPhone
> >>
> >>> On May 24, 2015, at 16:35, Dan Watson <watsondaniel3 at gmail.com> wrote:
> >>>
> >>> Hi,
> >>>
> >>> I just picked up an Austron 1210D-03 on eBay. It was an impulse
> purchase
> >>> based on the apparent condition and the fact that it seems like a nice
> >> old
> >>> clock/reference. I searched for old posts about this unit, found mostly
> >>> discussion about the manual and battery pack. Hopefully the price I
> paid
> >> is
> >>> ok.
> >>>
> >>> Can anyone tell me about these units?
> >>>
> >>> Also, there's one left:
> >>>
> >>>
> >>
> http://www.ebay.com/itm/AUSTRON-MODEL-1210D-03-CRYSTAL-CLOCK-/261899740547
> >>>
> >>>
> >>> Thanks!
> >>>
> >>> Dan
> >>> _______________________________________________
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