20 May
2003
20 May
'03
12:20 p.m.
Tom
The DCAs (Decimal Counter Assembly) in those counters (5243 series, 5245
series) came in low and high speed versions. The -6016 is the normal low
speed 600kHz version used in most of the count positions and provides +1224
BCD output to the rear panel connector. The -6003 version is the option 03
variation of it that provided 1248 BCD output with the '1' state
negative.(as opposed to the -6002 which was the same but with '1' state
positive.)
I have schematics if you need 'em- my 5245M still rolls along quite nicely
since it knows I have the service info!
Cheers
Dave Brown
Christchurch, NZ
----- Original Message -----
From: "Tom Uban" <uban(a)ubanproductions.com>
To: <cctalk(a)classiccmp.org>
Sent: Wednesday, May 21, 2003 8:50 AM
Subject: HP nixie tube module information needed
Hello,
Probably my best find at the recent Hamvention in Dayton OH was a
stack of nixie tube modules made by HP. In retrospect, I wish that
I had purchased the whole box of them, but I hopefully have enough
to at least make a clock.
I have two variations on the modules, the part numbers are:
HP 05212-6016 series 648
HP 05212-6003 series 415
They both use Borroughs B422 nixie tubes and look like they may have
an integrated HV supply of some sort.
Here are a couple of pics for reference:
http://www.ubanproductions.com/Images/nixie1.jpg
http://www.ubanproductions.com/Images/nixie2.jpg
I would appreciate if anyone can tell me what HP (or other) instruments
may have used these modules. I would also like to find a schematic of
the module if possible.
Thanks!
--tom
