[R-390] OT: Misc. Mil Parts Question

[Michael Melland]

A guy at work that was in the Navy back in the 60's dug some NOS parts out
of his garage and gave them to me.  I got them cleaned up today and was
wondering if anyone recognizes them or has any idea if they'd still be
useful ?

1.  Gray plug in "tube like" round cans, abt 2.5 " long, marked Engineer
Electronics, T-643, Flip-Flop.... are these early flip-flop IC's ?

2.  Several NOS Polyphase Instrument Co, LPF 14.5 KC 47K, marked also 6540

3.  About 2.75 " long black paper tubes with 6-pins on one end and a socket
with spring loaded contact on the other.  Marked with a "pulse trace" with
3C and a part number 3004325.  Look almost like a bulb socket of some type.

He told me these were  comm. items as he worked as an ET in a RTTY room....

Mike
--
Michael Melland, W9WIS
Winneconne, Wisconsin USA EN54pc
qrp-l #1656 - qrparci # 9875 - iparc #252
ars #1075  -  http://webpages.charter.net/w9wis/