Products > Test Equipment

HP 5316A Teardown and Frequency Standard

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schopi68:

--- Quote from: xrunner on April 08, 2015, 05:34:23 pm ---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.

--- End quote ---

seems to be in a good condition. What is the serial number (to get the production date)?

xrunner:

--- Quote from: schopi68 on April 08, 2015, 08:22:33 pm ---
--- Quote from: xrunner on April 08, 2015, 05:34:23 pm ---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.

--- End quote ---

seems to be in a good condition. What is the serial number (to get the production date)?

--- End quote ---

2204A09671

Can you get the date?

PA0PBZ:
Let me throw in a guess: Week 4 1982, made in USA?

schopi68:

--- Quote from: xrunner on April 08, 2015, 09:26:15 pm ---2204A09671
Can you get the date?

--- End quote ---

yes, that's possible. But i have to correct myself a little bit: the date encoded in the serial number is the date of the last design change. In most of the cases this corresponds to the real production date within a rage of 1 or 2 years.

The serial number is built of two parts:

The serial number prefix contains the date of the design change and the country of origin.
The first two digits indicate the year (beginning with 1960 = 00)
The second two digits indicate the week.
The Letter designates to A=USA G=Germany J=Japan U=United Kingdom
The third part is the 5-digit serial number starting with 00101

So your unit was built after week 4 in 1982 in America.

To get a more exact date you should have a look on the datecode of the parts in the device.

xrunner:

--- Quote from: schopi68 on April 08, 2015, 09:48:28 pm ---The serial number is built of two parts:

The serial number prefix contains the date of the design change and the country of origin.
The first two digits indicate the year (beginning with 1960 = 00)
The second two digits indicate the week.
The Letter designates to A=USA G=Germany J=Japan U=United Kingdom
The third part is the 5-digit serial number starting with 00101

So your unit was built after week 4 in 1982 in America.

To get a more exact date you should have a look on the datecode of the parts in the device.

--- End quote ---

Thanks for that info.

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. I did find the microcomputer IC was not seated properly in it's socket, so fixed that. Also interesting is the LED display ICs are all in sockets, as opposed to the two other HP DMMs of that era I have, which are all soldered in. Noted too is the ability to slide the plexiglass panel out from the aluminum front panel. Also found was the B Channel Level / Sens pot had a leg worked loose from the solder, so needs to be touched up.











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