if you email me a scan of the card I may know what it is.
Thanks Ed Sharpe archivist for SMECC
Please check our web site at
http://www.smecc.org
to see other engineering fields, communications and computation stuff we
buy, and by all means when in Arizona drop in and see us.
address:
coury house / smecc
5802 w palmaire ave
glendale az 85301
----- Original Message -----
From: "Joe" <rigdonj_at_cfl.rr.com>
To: <cctalk_at_classiccmp.org>
Sent: Thursday, July 10, 2003 8:20 PM
Subject: Can anyone id these HP ICs?
> Picked up an HP circuit card today with some NEAT looking ICs. The ICs
> are 16 pin DIP packages but are made entirely of gold and ceramic. They
> have a gold bottom plate then a layer of white ceramic with what appears
to
> be a gold ring around the top then a gold lid soldered to that. The legs
> are also all gold. They sit on gold plates that are slightly smalled than
> the ICs and the plates have a single leg coming off of each end that is
> soldered to the circuit board. The IC legs don't even mount in regular IC
> sockets instead there is a gold leaf terminal for each leg. I've never
seen
> that type of terminals used for ICs before but HP does use them for
> individual wires in some of their products. The wires to the card readers
> in the HP-67 and HP-41 card readers are connected that way. I have no idea
> what this card came out of other than it's made by HP. The part number
> that's on it doesn't help id it either. There are 12 of these strange
> looking ICs on the card. They have HP logos and all the part number
> 1820-2000, 1820-1999 or 1820-0753. I've searched the net for those numbers
> and checked the on-line HP part number cross references but didn't find
> anything. However the 1820 prefix usually indicates that the part uses TTL
> levels.
>
> Any ideas?
>
> Joe
Received on Sun Jul 13 2003 - 21:58:07 BST