[time-nuts] HP5370 board needed

Tom Holmes tholmes at woh.rr.com
Tue Apr 12 17:47:37 UTC 2011


Hey Joe...

I don't know that he really hijacked it or intended to, as he did change the
subject line. He apparently just slipped up and left your message text in
his new topic message.

I agree that hijacking or piggybacking or whatever name it gets makes it
hard to search the archive, which is what makes the idea of threads valuable
here. 

We all make mistakes at times. It only becomes bad manners when the same
mistake is committed repeatedly or intentionally.

:-).

Tom Holmes, N8ZM
Tipp City, OH
EM79


> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Joseph Gray
> Sent: Tuesday, April 12, 2011 1:10 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP5370 board needed
> 
> It's recommended to start your own thread, rather than hijack someone
> else's. Having totally irrelevant questions tacked on to an existing
> thread is very confusing and considered bad manners.
> 
> Joe Gray
> W5JG
> 
> On Tue, Apr 12, 2011 at 10:37 AM, Paramithiotti, Luciano Paolo S
> <luciano.paramithiotti at hp.com> wrote:
> > Hi all,
> >
> > Do someone have an interpolation board for HP5370A pn 05370-60119  to
sell?
> > I have an Error 04 PLL not locked and vco range is out of range at +2.xx
Volts on
> one of the two boards.
> >
> > Thanks,
> > Luciano
> >
> > Luciano P. S. Paramithiotti
> >
> >
> >
> > -----Original Message-----
> > From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Joseph Gray
> > Sent: martedì 12 aprile 2011 17.37
> > To: Discussion of precise time and frequency measurement
> > Subject: Re: [time-nuts] Ovenaire OCXOs
> >
> > After running overnight, the current draw has stabileized at 160 mA. I
tweaked
> the trim pot to set the frequency to 10,000,000.00 Hz, which is the
resolution of my
> counter. The counter is synced to the Z3801A.
> > The Ovenaire is exposed to ambient air, so I expect things to change as
the day
> warms up.
> >
> > Using an IR thermometer, the OCXO metal can temperature varies a bit,
but has
> a hot spot at 37.6 C. I'll have to dig out a contact temperature probe for
more
> accurate readings.
> >
> > Later on, I'll put this thing in an enclosure, which should minimize
temperature
> effects. Then I can see where the temperature stabilizes from the oven
heat. The
> T.I. comparison will have to wait a few days, as I need my laptop for
something else
> tomorrow night.
> >
> > Joe Gray
> > W5JG
> >
> > On Tue, Apr 12, 2011 at 7:27 AM, John Green <wpxs472 at gmail.com> wrote:
> >> Interesting. I have several Ovenaire OCXOs of differing models. I used
> >> to think they were pretty stable until I compared them to my Z3801.
> >> Compared to a '3801, they stink. But then, a rubidium stinks compared
> >> to a 3801. Most have a voltage input for frequency adjustment but one
> >> has a trimmer cap for coarse and a pot for fine. Over a period of
> >> several days, I would think it had settled down only to come back and
> >> find it had suddenly shifted. As they say, stable is a relative term.
> >> About all I can say after testing maybe a half dozen from different
> >> manufacturers it that the specifications should be taken with a
> >> liberal dose of salt. I have seen TCXOs do better than a lot of OCXOs
> >> over the limited temperature range of my lab. I have a chamber and
> >> keep saying I am going to do some temperature testing but work is
always
> getting in the way.
> >> _______________________________________________
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> >>
> >>
> >
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