24 Jul
2016
24 Jul
'16
6:13 p.m.
Mattis:
By the description, it is a 1 of 10 decoder chip.
Have you looked to see if it pinout compatable
with a 7442?
Karl
----- Original Message -----
From: "Mattis Lind" <mattislind at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Sunday, July 24, 2016 5:01 AM
Subject: Signetics N8251 source?
After successfully repairing the G231 module of the
MM11-L set I continued
with the next one. This one was not able to access addresses ending 0100
(binary). Luckily it was not the transistors arrays that were bad but the
selector chip. A Signetics N8251 chip.
I found a source on ebay at $4.95 each plus $13 shipping. A little bit to
much for my taste (although I could make an offer)
Anyone know of a cheaper source? I could use five or ten maybe.
/Mattis