10 May
2017
10 May
'17
1:55 a.m.
On May 9, 2017, at 4:41 PM, Pete Lancashire <pete
at petelancashire.com> wrote:
The relays were from WECO. Made by the millions, they were the ones used in all Bell
telephone exchanged from the early 50's up to the ESS (electronic) exchanges. Remember
seeing ones with less then a full compliment of contacts, but that was pretty uncommon.
https://archive.org/details/bstj31-6-1023
Nice, thanks. I recognize the older "U" style relays, my father used a bunch of
those in various ham radio projects.
The end of that article describes Wire Wrap technology. I wonder if that was the first
time it appeared.
paul