[time-nuts] End-of-Range: Oscilloquartz OCXO 8600-3
EWKehren at aol.com
EWKehren at aol.com
Fri Dec 8 13:35:21 EST 2017
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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--
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