[GreenKeys] AN/FGC-38 Torn-Tape Relay Equipment

[Jim Haynes]

Depending on traffic volume, an incoming line could have a "tape-changing
reperforator" assigned so it could be turned on when the regular reperf
was getting low on tape.

On another topic, there have been times when reality left the scene.
A book "United States Army in Vietnam.  Military communications, a test 
for technology"  by John D. Bergen tells of an incident - I'm relying on
memory now, rather than looking it up in the book - where a message was
started with Operational Immediate precedence, and the message was so 
large that it took something like 8 hours for the originating operator to 
punch into tape.  Meanwhile nothing of lower precedence could be sent 
because of the rules governing precedence.