This has given me some ideas for synchronizing signals around the shack,
including the use as an ultra-high stability reference for my RX-340. The
stability of the RX-340 is exceptional, but I like the idea of never having
to check and adjust frequency calibration ever again.
I just ordered the set from www.buylegacy.com which includes the GPS
receiver, antenna and 48VDC power supply for about $350.00. Thanks Eric
(both of you!) for pointing this out.
-Paul. W9AC
----- Original Message -----
From: "Eric F. Richards" <efricha@dimensional.com>
To: <tentec@contesting.com>
Sent: Tuesday, June 03, 2003 22:14 PM
Subject: RE: [TenTec] Some Observations on Orion Stability/Calibration
> At 09:30 PM 6/3/2003 -0400, Eric Scace K3NA wrote:
> > If folks are particularly interested in frequency accuracy, a recent
> > issue of "QEX" discussed how to setup a GPS-slaved time &
> >frequency standard. A readily available surplus unit (used in the
> >cellular telephone industry) was featured in the article. The
> >unit provides a high-accuracy 10 MHz signal and time-of-day. These have
> >been advertised in "QST" and "QEX" for about $265 over the
> >last year or so. Achieving a stable and accurate local standard based on
> >this little rack-mount box would be much easier than
> >WWV-based solutions.
>
> I use one of these with my RX-340, where it literally is a plug-n-play
> solution.
>
>
> > A very ambitious person would devise a system for slaving the Orion
> > TCXO to an external 10 MHz standard.
> >
> > I have used double-oven 10 MHz local standards (also retired from the
> > telecommunication industry) whose accuracy was tracked
> >against WWVB at 60 kHz with a chart recorder. This approach is accurate
> >enough to observe the daily aging rate of the crystal
> >(after a few days of measurements). A WWVB-based calibration mechanism
> >would also be quite accurate, but it does require a recorder
> >and more time. The GPS-slaved system is much faster, which is why it is
> >in common use today.
> >
> >-- Eric K3NA
>
> This receiver seems to be a single oven but is highly accurate and has
> low phase noise. Software beyond the basic SCPI command set can be found
> at http://www.realhamradio.com/gpscon.htm to control as well as chart
> accuracy over time.
>
> The receiver itself is available from www.buylegacy.com and at $249 is
> a no-brainer when compared to the $4k rig it is used with. The manual
> is online at buylegacy.
>
> Eric
>
> --
> Eric F. Richards
> efricha@dimensional.com
> "The weird part is that I can feel productive even when I'm doomed."
> - Dilbert
>
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