[time-nuts] End-of-Range: Oscilloquartz OCXO 8600-3

[paul swed]

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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