18 Jul
2003
18 Jul
'03
4:34 a.m.
Hi Stan,
Thanks for the info. Any idea whey the fancy construction? I've dealt
with ECL before but never seen anything like this.
BTW I'm made copies of that memory board manual for you. It's packed and
ready to ship. I'll try to drop it off at the post office today.
Joe
At 08:21 PM 7/17/03 -0700, you wrote:
Hi Joe,
The 05370-60022 part number IDs this as the Arming Board from the HP 5370A/B
counter. The 1820-0753 is an ECL dual 3-input gate, the 1820-1999 is a
multiplexer, and the 1820-2000 is a D flip-flop. These are all ECL IC's, and
on each of them the two end pins are connected to the substrate and tied to
the -5.2 V bus. These two pins act as both power input and heat sinks for
the chip.
Stan
Message: 3
Date: Tue, 15 Jul 2003 15:54:54
To: cctalk(a)classiccmp.org
From: Joe <rigdonj(a)cfl.rr.com>
Subject: Re: Can anyone id these HP ICs? (Joe)
Reply-To: cctalk(a)classiccmp.org
Bingo! You're right. It's part number is 05370-60022. I had tried to
look up that number but all I found was a scanner with the same PN. Do you
have a service manual for this? If so, can you tell me what these parts
are? PNs 1820-0753, 1820-2000 and 1820-1999.
Joe
At 10:55 AM 7/15/03 -0700, you wrote:
Hi Joe,
Your board looks like one of the interpolator cards from an HP 5370A
Universal Time
Interval Counter. Do you see an "05370-6xxxx" part number on
the board anywhere?
Message: 14
Date: Mon, 14 Jul 2003 17:52:26
To: cctalk(a)classiccmp.org
From: Joe <rigdonj(a)cfl.rr.com>
Subject: Re: Can anyone id these HP ICs?
Reply-To: cctalk(a)classiccmp.org
Hi Ed,
I posted a picture at
<http://home.cfl.rr.com/rigdon14/t-bird/hp-ic.jpg>.
I unplugged the two ICs in the top RH corner and turned them over so that
you can see the bottom and side of the ICs and the heat sink that the IC
normally sits on. There is a depression in the bottom of the IC case and a
rasied pad on the heatsink that fits into the depression. I've never seen
anything like this before! Note the delay line (?) on the LH side of the
card. Sorry I couldn't get a better picture. This is as close as I could
get with my camera.
Joe
--__--__--