Poking around, I've discovered that the RTT
("Read Timing Track") output
from the drive has a constant square wave of about 400kHz
Am I right
that this is really screwed up, or do I just not understand how it works?
--
That's the way it works. It drops to the correct frequency when the tape
is moving.
TC-11's and 08's depend on this in the 'up to speed' circuit.