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@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, > jn6...@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 <paulsw...@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 <kb...@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@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 > > > > _______________________________________________ > > > > time-nuts mailing list -- time-nuts@febo.com > > > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > > > mailman/listinfo/time-nuts > > > > and follow the instructions there. > > > > > > _______________________________________________ > > > time-nuts mailing list -- time-nuts@febo.com > > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > > > mailman/listinfo/time-nuts > > > and follow the instructions there. > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > -- > Sent from my iPad 4. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.