27 May
2013
27 May
'13
11:14 a.m.
On 2013 May 27, at 8:47 AM, Dave wrote:
On 27/05/2013 15:18, ben wrote:
*Core memory* pulse transformers are widely available? Really? I have
wondered about ethernet isolation transformers as substitutes, as
they are the only current devices I can think of offhand that are in
any way comparable, but have not looked into the comparitive
characteristics.
On 5/27/2013 3:33 AM, Dave wrote:
They are actually widely available but finding a match looks fun,
In all cases the price is at least $5 per transformer.... These are almost certainly pulse transformers,
not "chips" as
such, so
real miniature transformers. Try a google search on "core memory
pulse
transformer" here are two I found usefull.
http://www.dtic.mil/dtic/tr/fulltext/u2/045016.pdf
https://sites.google.com/site/wayneholder/one-bit-ferrite-core-
memory
Given that I wonder if its possible to salvage the original
"innards"
and mount them on a 16-pin dip carrier. Have you tried opening
one up or
are they fully encapsulated in a solid material. If they are
solid is
there enough material left to solder to a 16-pin carrier. I think
photos
would help. Finding modern replacements sounds fun and expensive
(about
$5 min).....
Dave
G4UGM
Hammond transformers sells pulse transformers.
Ben.