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.