For about $500 you can buy a new in the box Rubidium Atomic Frequency standard.
73
Bill wa4lav
At 09:13 AM 6/4/2003 -0400, Paul Christensen, Esq. wrote:
>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
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
>
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