Products > Test Equipment
HP 5316A Teardown and Frequency Standard
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nixxon:

--- Quote from: JoeD on November 29, 2014, 12:21:32 pm ---Received a board from amc184 and have built and fitted to my 5316a. Working well, have used rubidium reference to set it up and it's very stable. The Morion OXCOs are absolutely rock steady and the fourth picture shows the oscillator output reading on a Racal 1998 in overflow mode. That's 10.000000010 MHz ie 10 parts in a billion out...
Nice board Anton, thanks very much

JoeD

--- End quote ---

If I have got it right, the Racal reading of 10.000000010 MHz is only 1 part in a billion out (0.01 Hz or 10 mHz off).
A 3.6° (1/100) turn on the 20-turn pot, roughly,  should make it 10 times more accurate. That is unless the OCXO drifts a lot at this level of accuracy resolution.
schopi68:
Ugh.  :palm: I've just finished my OCXO-Replacement for the 5316B, built some spare devices and now i found this thread. Hmmm... maybe i should have had a look into this forum during the last months.
nixxon:

--- Quote from: schopi68 on March 29, 2015, 03:06:42 pm ---Ugh.  :palm: I've just finished my OCXO-Replacement for the 5316B, built some spare devices and now i found this thread. Hmmm... maybe i should have had a look into this forum during the last months.

--- End quote ---

Did you design your own OCXO "option 004 equivalent"? How did you solve it? Any pictures?
schopi68:

--- Quote from: nixxon on March 31, 2015, 04:44:16 pm ---Did you design your own OCXO "option 004 equivalent"? How did you solve it? Any pictures?

--- End quote ---

yes, i did my own design, starting last november. Currently i am in the progress of writing down the most important things on my web page to document everything as i have the intention to make the device also available for other interested hams and electronic enthusiasts.
In the meantime the first four devices will get a "one month burn in" to ensure that the old MV85 OCXOs i used (in three devices) are still reliable and to give the new AXTAL OCXO in the fourth device some pre-aging before doing the final calibration with my GPS-based reference.
I have some pictures on my website
(This is the overall project page which i am still updating).

This is an image of my device side by side to the original hp 05316-60008 oscillator:
xrunner:
No need for a new thread - just got this in from an Ebay seller. Got a replacement knob from another seller too. Haven't turned it on yet.

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