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| HP 5316A Teardown and Frequency Standard |
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| cpu_bach:
After receiving the stand-offs, I mounted OCXO board in my HP5316A. IC heatsink comes very close to HP-IB board, but there is a clearance. |
| amc184:
Looks good, shame your OCXO came with such short legs. I would have used a smaller heatsink for U101, but if it fits it works. I'm in a metric country, so I would have rather used metric standoffs as well, but it's driven by the imperial threaded inserts in the mainboard. I think at least one person used a smaller diameter metric standoff with a nut, using the inserts like a plain hole. And yeah, for a half width unit it's really deep. |
| wmactor:
--- Quote from: amc184 on October 17, 2014, 05:14:31 am --- I have some spare PCBs as well, if you have a 5316A and want one PM me. I think it should work in a 5316B as well. --- End quote --- --------- Thanks for sending me one of your boards, amc184 - much appreciated! I finally received the MV-85 OCXO module from China, and assembled the circuit. It fit perfectly into my 5316B, calibrated well, and is running very stable. Here are a few pictures... The first photo shows the assembled board, and the second is a shot of it installed in my 5316B. The third is an overall view of the 5316B with the module installed, running a self test - the original HP oscillator is on the table to the left of the unit. The fourth photo is my 3336C generator (with its original HP OCXO installed) sending a signal of 59,932,416.9 Hz to the 5316B, and the counter displaying it accurately! Thanks again, Anton, for all of your effort on this project! Regards, Wayne Toronto, Canada |
| kj7e:
Thought I would add some photos of a recent addition, although its the B version. I found a clean 5316B with option 003 (1GHz Channel C) and a parts only 5316B with option 004 (High Stability OCTX). The Oven and voltage regulator in the parts unit worked perfectly so they where transplanted. Even though the original blue Sprague power supply caps seemed okay, I replaced then with some slightly higher capacity Nichicon caps, Digikey part numbers below; 1 1 493-1312-ND UVZ1E223MRD CAP ALUM 22000UF 20% 25V RADIAL 0 4.25000 $4.25 2 1 493-1326-ND UVZ1V682MRD CAP ALUM 6800UF 20% 35V RADIAL 0 3.14000 $3.14 Did they really have to make it so long? Option 004; Power supply caps replaced; Input and option 003 board; |
| xrunner:
Nice 5316B. I got one last year and it's a great unit. :-+ |
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