Hi Carl,
Will be sending you the dinero for ur CD program for the Jupe next week;Need
to to know if its WinXP Pro compatable as I just upgraded my OS.Also got my
"chinese copy " of the ACR-155 done and will send u the pix of that also.
73 de Bill W4NJF
----- Original Message -----
From: "Carl Moreschi" <n4py@earthlink.net>
To: <tentec@contesting.com>
Sent: Monday, June 02, 2003 7:02 PM
Subject: Re: [TenTec] Some Observations on Orion Stability/Calibration
> I am having a hard time understanding where this propagation frequency
error
> could come from. It seems to me that if WWV was at 15 mhz and I was
> receiving a 14.999990 frequency, this 10 hertz frequency error would be
> building up some place in a time warp! I could understand an
instantaneous
> error over a few milliseconds but it should average out to be right on the
> mark in a few seconds. If it doesn't, then either WWV or my station are
> moving relative to one another and there is a doppler shift going on!
>
> Carl Moreschi N4PY
> Franklinton, NC
> ----- Original Message -----
> From: "Gary Hoffman" <ghoffman@spacetech.com>
> To: <geraldj@isunet.net>; <tentec@contesting.com>
> Sent: Monday, June 02, 2003 10:39 PM
> Subject: Re: [TenTec] Some Observations on Orion Stability/Calibration
>
>
> > Jerry...
> >
> > How do you know that propagation delays cause about a 1 ppm error ? I
> have
> > not found that figure referenced elsewhere, and would like to know how
to
> > measure or estimate it. Thanks !
> >
> > Gary
> >
> > ----- Original Message -----
> > From: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
> > To: <tentec@contesting.com>
> > Sent: Monday, June 02, 2003 3:05 PM
> > Subject: Re: [TenTec] Some Observations on Orion Stability/Calibration
> >
> >
> > > TC stands for Temperature Compensated, NOT Temperature Controlled. So
> > > the oscillator controls should be responding to its environment.
> > >
> > > But HF propagation causes short term variations in frequency of about
1
> > > part per million, 20 HZ at 20 MHz WWV so the measurements may not be
of
> > > the TCXO but likely are of propagation changes. Frequency measurement
> > > specialists expect it to take a month of averaging HF WWV signals to
get
> > > to within that 1 PPM. Hoping to do it in hours just isn't going to
> > > happen.
> > >
> > > Only propagation at VLF, like 20 and 60 KHz can allow better frequency
> > > distribution than a PPM, and then its not right if there's an aurora
> > > about like there has been last week.
> > >
> > > 73, Jerry, K0CQ
> > >
> > > --
> > > Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
> > > Reproduction by permission only.
> > > _______________________________________________
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> > > TenTec@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/tentec
> > >
> >
> >
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>
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