26 Feb
1999
26 Feb
'99
11:37 a.m.
Upon the date 06:58 PM 2/26/99 +0000, Joe said something like:
At 05:21 PM 2/26/99 -0500, Chris wrote:
The result obtained after adding 6000 must not be construed as still being
a calendar year date. 6000 + 503 still equals 6503 or the 3rd week of 1965.
6000 + 1834 equals 7834, 34th week of '78.
60 is the number to add to the first _two_ digits of the four digit number.
I should have said to use the 60 thing which is the other way we were
instructed how to decipher the date.
Upon the date 12:40 PM 2/26/99 -0800, Sellam
Ismail said something like:
Add 6000? that would mean it was (will be?) built in the year 6005! No,
Does anybody know when Hewlett-Packard made the Model 130C oscilloscope?
Its tube based. The serial number is 503-03353.
Sometime just after the 3rd week of 1965.
Rule for deciphering HP SN's in the above format as tought to me by a
couple of different HP service engineers and other written sources:
Take the numbers preceding the hyphen and add 6000. Result gives the first
two digits as the year add 1960 to the first two digits of a four digit prefix
or add to the first
digit of a three digit prefix. That means it was built in 1965.
1960 added to the first two digits is the number stated in an HP document I
recall from way back when which is yet another way HP instructed customers
how to decipher the SN.
and the second pair is (usually) the week of
The week digits are the week date the number was assigned to the production
item.
Regards, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.ggw.org/awa
production. Numbers after the hyphen are the
serialized number.
1834A-xxxxxx is some unit built around 34th week of 1978, for example.
That's ALLMOST true. Actually the dates on most (all?) items are offset