Path: utzoo!attcan!uunet!snorkelwacker!husc6!mgh-znmr!mike
From: mike@mgh-znmr.harvard.EDU (Mike Vevea)
Newsgroups: comp.arch
Subject: Re: Magnetic amplifiers? [was Re: Mercury delay lines]
Message-ID: <3190@husc6.harvard.edu>
Date: 12 Jun 90 23:10:09 GMT
References: <2072@mindlink.UUCP> <25079@weitek.WEITEK.COM>
Sender: news@husc6.harvard.edu
Reply-To: mike@mgh-znmr.harvard.edu (Mike Vevea)
Organization: Mass General Hospital MRI Lab
Lines: 13

Refering to magnetic amplifiers, 
In article <25079@weitek.WEITEK.COM> weaver@weitek.UUCP (Michael Weaver) writes:
>The only commercial use I have heard of was in one of the first 
>core memories sold by IBM.

I don't remember much about how they worked, but the Univac/Remington Rand
SS-80 and SS-90, built in the late 1950s used magnetic amplifiers instead
of tubes or transisters as the active element in their gates.  There are
a few others around (Ed Gould?? Mike Albaugh?? Can you correct my fading
memories?).  The computer club at UC Berkeley had a couple of these in
the late 1960s/early 1970s.

mikeV  (mike@mgh-znmr.harvard.edu)