NOTE: This only indicates the presence of a correct signal being fed to, or coming from the
head, and does not guarantee correct recording of the signal. This should be checked by
switching the modulometer to "PILOT" playback (this does not function in the "RECORD"
mode).
16. SPEED AND POWER INDICATOR
This rotary "SASS" type indicator gives a quick visual indication that the machine is functioning correctly and
will indicate a white segment when this is the case. It will turn black whenever any of the following conditions
occur:
– The Power supply voltage (batteries or external) becomes insufficient for correct operation of
the machine.
– The motor current reaches its maximum limit, in this case voltage and speed stabilizer circuit
A22 requires the motor to run faster, but this is not possible because the automatic current
limiter circuit has been activated. (If this occurs during normal operation, then contact your
nearest Nagra agent.)
– "WOW and FLUTTER" is out of tolerance. (Contact Nagra agent).
Thus, when a white segment is indicated, the operator can be absolutely sure that the power supply is sufficient,
that the motor current is correct, and that the tape speed is within tolerance.
17. HEADPHONES OUTPUT
This 1/4" jack type socket (type 297) is the headphones output socket accepting headphones with an imped-
ance of anything from 50 Ω to 600 Ω.
18. HEADPHONES VOLUME CONTROL
This small potentiometer is adjustable using a screwdriver and adjusts the level fed to headphones output
connector (17).
Position 1 is the minimum and position 6 is the maximum.
19. REEL FIXING NUT
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