[time-nuts] HP-103AR Oscillator is dead

Magnus Danielson magnus at rubidium.dyndns.org
Sun Jul 23 05:51:34 EDT 2017


On 07/23/2017 08:17 AM, Jeremy Nichols wrote:
> My new-to-me HP-103AR Quartz Oscillator works perfectly . . . except for
> the oscillator in its oven! The oscillator gets power (-20V) but produces
> no output. The amplifiers and 100 KHz divider work correctly if I inject a
> signal from an external oscillator. The power supply and oven circuits work.
> The manual says only to return the oven package to the factory. I can find
> only one mention of anyone in this list trying to take a 103AR
> oscillator/oven apart and that was back in 2009. Has anyone since done any
> work and has tips to share?

I had the same issue with my 5060, but figured out that I needed to tune 
the crystal filter to get output. That helped to get a clock output 
again. I don't know if you have that on the oven in the HP103AR, but if 
you do, check it.


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