[time-nuts] End-of-Range: Oscilloquartz OCXO 8600-3
paul swed
paulswedb at gmail.com
Fri Dec 8 18:51:46 UTC 2017
Berts right about the 80C that seems high. But when I looked at the spec
sheet no details.
Regards
Paul
On Fri, Dec 8, 2017 at 1:35 PM, Bert Kehren via time-nuts <
time-nuts at febo.com> wrote:
> What about 80 C is that normal for an 8600?
> Bert Kehren
>
>
> In a message dated 12/8/2017 11:32:14 A.M. Eastern Standard Time,
> jn6wfo at gmail.com writes:
>
> My HP-103AR frequency standard has a similar problem. I have been advised
> to take it apart and replace one of the capacitors in order to bring the
> frequency back into the range of adjustment. Sounds like you have the same
> problem.
>
> Jeremy
>
>
> On Fri, Dec 8, 2017 at 7:52 AM paul swed <paulswedb at gmail.com> wrote:
>
> > I took a quick look at the spec sheet.
> > It appears coarse adjustment is an option M and would actually be a pot.
> > That speaks to another tuning diode for coarse? Or a pot on pot
> > arrangement.
> > That sounds ugly.
> > Regards
> > Paul
> > WB8TSL
> >
> > On Fri, Dec 8, 2017 at 10:17 AM, Bob kb8tq <kb8tq at n1k.org> wrote:
> >
> > > Hi
> > >
> > > It is quite possible that nothing is actually broken and that the
> crystal
> > > has simply drifted
> > > outside the tuning range. It should be pretty easy to spot the coarse
> > > tuning device once
> > > the package is open. I would bet you will find a selected capacitor
> > across
> > > the coarse tune or in
> > > series with the coarse tune. Changing the value of that cap should
> bring
> > > things back on
> > > frequency. I would avoid changing caps across the EFC tuning diode.
> > >
> > > Bob
> > >
> > > > On Dec 8, 2017, at 8:05 AM, Ulf Kylenfall via time-nuts <
> > > time-nuts at febo.com> wrote:
> > > >
> > > >
> > > > Gentlemen,
> > > > We have an Oscilloquartz OCXO 8600-3that cannot any longer be
> adjusted
> > > into 5,000,000 Hz.It is about 1 Hz out of 5 MHz and turning
> > > coarse/fineadjustment potentiometers cannot bring the frequencyinto
> its
> > > specification.
> > > > Oven temperature is about + 80C accordingto the thermistor and the
> > > operating voltageis at 24 VDC.
> > > > Have Googled but the only thing that turns upis datasheets w/o any
> > > details.
> > > > Before I take it apart and start lookingfor obviously broken
> > components,
> > > isthere anyone that has a CLIP on this unit?
> > > > 73
> > > >
> > > > Ulf Kylenfall - SM6GXV
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> --
> Sent from my iPad 4.
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