[GreenKeys] AP Seeds #2

[Sheldon Daitch]

I think the baud rate on the six-level circuits was
slightly higher than that of the five-level circuit,
since, as best I remember, the gears were the same, the
main shaft ran at the same speed, but the six-level
machines had the one additional information pulse.

The AP in North Carolina had many M15 and M20 machines
across the state, with a handful of Extel printers.  The
service package gave the radio/TV wire subscriber a M15 but
if that subscriber wanted an Extel, they could get it at
extra cost.

I think the UPI radio service was ahead of the AP in
converting to newer equipment.  When I went to work for
a radio station in NC in 1976, they had a UPI Extel printer.