Nagra PORTABLE ANALOGUE AUDIO TAPE RECORDER Instruction Manual - page 14
TAPE DECK
20. SPEED AND EQUALIZATION SELECTOR
This is a six position rotary switch permitting the selection of the speed and equalization of the 4.2 in
both record and playback.
Possible settings are:
3 3/4
ips
(9.525 cm/s)
7½
ips
(19.05 cm/s)
15
ips
(38.10 cm/s)
For each of these speed selections there are two possible positions labeled I (STD) and II (LN)
these correspond to different tape types.
For best quality recordings the 15 ips speed is recommended.
For normal recordings, the 7½ ips speed is available. The 3 3/4 ips speed is available for those
cases where the length of recording time of the tape is more critical than the actual quality of the
recording.
21. MOBILE TAPE GUIDE
22. PINCHROLLER
23. REWIND AND FAST FORWARD SWITCH
REWIND
is possible with main selector (4) in any position other than STOP, assuming
pinch roller lever (32) is in the fully open position.
FAST FORWARD
is possible only with main function selector (4) in the playback (with
loudspeaker) position and pinch roller lever (32) fully engaged.
The central position of this switch is OFF and this is the position that the switch should be in
whenever the machine is not required to spool. Keeping it in this position will prevent accidental
spooling of the tape when opening the pinch roller gate or playing back a recorded tape through the
internal loudspeaker.
24. & 34. TAPE REELS
The 4.2 can be used with reels up to a maximum diameter of 5" (127 mm) with the plexi-glass lid
closed, or up to 7" (178 mm) with the lid open. However, if the QSET option is fitted to the machine
the 7" (178 mm) reels may be used with the lid closed.
If it is necessary to use reels of up to 10" (254 mm), then the QGB large reel adapter may be used.
See Accessories.
25. & 33. TENSION ROLLERS
These two rollers keep the tape tension constant and ensure correct tape handling and positioning.
During normal use neither of these two rollers should be at either end of its travel. If this is the case
refer to the MECHANICAL CALIBRATION section of the service manual.