[time-nuts] HP 105B oscillator

Tom Van Baak tvb at LeapSecond.com
Tue May 10 17:05:15 EDT 2016


Perry,

There are several op/svc manuals for the HP 105B. Original models used the 00105 brick oscillator; newer models the 10811. Check the S/N of your manual against the S/N of your hp 105B.

Yes, the 105B makes a good test bed. For years I used one to measure lots of 10811's.

/tvb

----- Original Message ----- 
From: "Perry Sandeen via time-nuts" <time-nuts at febo.com>
To: <time-nuts at febo.com>
Sent: Tuesday, May 10, 2016 12:10 AM
Subject: [time-nuts] HP 105B oscillator


List,
I purchased a HP 105B oscillator on ebay and it arrived today. Previous to getting it I D/L the manual and brief;y perused it.

So when I popped open the top cover to see the internal parts, what to my wondering eyes appeared Not the A1 module shown in the manual but a 10811 lookalike.
The only information on the oscillator is S/N 3010A59493 and R11215k.
So what do I have? The next question that comes to mind is the plug in base the same electrical configuration of the 10811? (Being a TN You can see where this is going.)
Leaving out the divide issue for the moment, this would seem to be an ideal test bed for my 10811 oscillators as the 3 in my 5370B's have no EFC adjustment installed and I have another 10811 spare.
I have enough 5370B's and 5335's in which I could put all my 10811's in to *incubate* for months before attempting to tune them.
Also are there upgrades that are practical to add to the present PS for greater stability. I am going to replace the original screw cap capacitor with a new Nichicon 105C cap.
Thoughts? 
Regards,
Perrier



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