[TenTec] Orion TCXO Warm Up Drift

[Mark Erbaugh]

I had a typo in my original post. I meant to say +/- 3 ppm and I thought
that was being generous.  1 ppm sound more likely for a TOL rig such as the
Orion. With +/- 1 ppm, the excursion should be less than 20 Hz (+/- 1 * 10)
at 10 MHz so the 35 Hz drift is way too high.

73,
Mark

----- Original Message -----
From: <nq5t at attbi.com>
To: <tentec at contesting.com>
Sent: Wednesday, June 18, 2003 11:35 AM
Subject: Re: [TenTec] Orion TCXO Warm Up Drift


> The spec is +/- 1 ppm at "room temperature" and +/- 3ppm "over
temperature",
> which I presume means over the defined operating range of 0-50 degC.
>
> As far as "excursion" is concerned, the range would be 2 ppm at "room
temp" and
> 6 ppm from 0-50 degC (if my interpretation of what "over temperature"
means is
> correct).
>
> Grant/NQ5T
>
> > > It looks like your Orion may be out of spec.  TT published specs on
> > Orion's
> > > temperature stability is +/- 10 ppm, At 10 MHz, that is 30 Hz.  Your
Orion
> > > had an excursion of 989.0 - 953.7 or 35.3 Hz. One would hope that the
+/-
> > 10
> > > ppm is 'worst case' but your measurements are even worse.
> > >
> > > 73,
> > > Mark
> > >
> > >
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