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

[Bob kb8tq]

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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