Products > Test Equipment
HP 5316A Teardown and Frequency Standard
amc184:
--- Quote ---yes, i did my own design, starting last november.
--- End quote ---
Your design looks great schopi68. It's funny how close the two independent designs came out. I chose to make mine horizontal because I thought it would be hard to get the right angle brakets that the original used. I like the unusual standoffs you've used, are they an off the shelf part?
--- Quote ---So your unit was built after week 4 in 1982 in America.
--- End quote ---
That's not quite how the HP serial numbers work. The first two digital are years since 1960, but it's the year of the last design revision. That's why that units serial starts with 22, meaning 1982, but many of the ICs are date coded 1983. It was a version they started producing in 1982, but this unit was from 1983 or later.
schopi68:
--- Quote from: amc184 on April 09, 2015, 04:33:38 am ---Your design looks great schopi68. It's funny how close the two independent designs came out. I chose to make mine horizontal because I thought it would be hard to get the right angle brakets that the original used. I like the unusual standoffs you've used, are they an off the shelf part?
--- End quote ---
Yes, tt is quite interesting to see how many OCXO-Boards for these old HP counters are currently on their way. Maybe now the time is ripe for this kind of boards. At the beginning of the year i planned to design a board for my HP 5334B too after finishing the 5316-pcb. But i am no longer sure if somebody else will do this job faster.
The standoffs are off the shelf parts, which i had to modify slightly. Normally they are mounted in a 90° direction, with the flattened side to the pcb. There has been a threaded hole in this side which i had to drill out. With this modification (and somewhat longer screws) it fits perfectly to the counters main board.
--- Quote from: amc184 on April 09, 2015, 04:33:38 am ---
--- Quote ---So your unit was built after week 4 in 1982 in America.
--- End quote ---
That's not quite how the HP serial numbers work. ...
--- End quote ---
Pleas have a second look to the description i made - i think i already wrote this. ;)
schopi68:
--- Quote from: xrunner on April 08, 2015, 10:37:36 pm ---
Since I'm doing a cosmetic restore, I'll post a few more pics that I didn't see in the thread. I have turned it on and it's working properly.
--- End quote ---
Great to see that it's still working!
When the device is still open (and maybe reassembled again :) )... I'd like to know if my pcb could fit into this device or if i have to find another heatsink. Could you measure the distance from the oscillator pcb's surface to the case?
xrunner:
--- Quote from: schopi68 on April 09, 2015, 09:42:20 am ---When the device is still open (and maybe reassembled again :) )... I'd like to know if my pcb could fit into this device or if i have to find another heatsink. Could you measure the distance from the oscillator pcb's surface to the case?
--- End quote ---
Yes I will do that today.
Also have a question about the PS filter caps, I'll post a pic about that as well.
xrunner:
The distance from main board to the top is 33 mm. Distance to the side of case is 28 mm (the case is curved so this is the smallest distance.
Have a question also. There are two main filter caps. Both of them have one negative lead and two positive leads. The 4700 uF axial has the two positive leads going to two two different traces, and the 2200 uF radial has the two positive leads going to a single trace (but on the schematic it does not indicate this). If I might want to replace these going forward, what is the designation to specify in the parts search engine of places like Mouser? I am not familiar with caps like these with two positive leads that aren't identified on the case as such. Does that means their are two complete capacitors inside them even though it does not specifically say so on the outside?
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version