Nagra PORTABLE ANALOGUE AUDIO TAPE RECORDER Instruction Manual - page 24
function selector is in the PLAYBACK (with loudspeaker) position. This is done to prevent accidental
winding of the tape during RECORDING.
While fast forwarding the tape, the audio on the tape will be heard through the internal loudspeaker.
To avoid damage to the loudspeaker, use the volume control (42) to decrease the level.
PLAYING BACK A RECORDED TAPE
Rewind the tape as explained above, then set main function selector (4) to one of the two possible
"PLAYBACK" positions (either with, or without loudspeaker). The signal from the tape is now
available on line output banana output connectors (45/46) on the right-hand side of the recorder. If
line and phones switch (1) is in the "TAPE" position, the signal is fed directly to the line outputs with
no possibility for adjustment. However, if it is in the "DIRECT" position then the output may be
adjusted with the "LINE AND PLAYBACK" potentiometer.
The frequency response may also be modified using "FILTER" switch (13).
WORKING WITH HEADPHONES
If headphones are to be used, they can be plugged into the jack socket (17) on the lower left-hand
front side of the machine.
The level of the headphones may be adjusted using potentiometer (18). In record, the signals can
be monitored either off tape or directly, depending on the position of the line and phones switch.
NOTE:
When the machine is in the "TEST" position, the headphones output is always fed with
the "DIRECT" signal.
The headphones output will accept a 1/4" stereo "JACK" connector (type 297) and can be used with
headphones having an impedance from 50 Ohm to 600 Ohm. (Optimum value is 200 Ohm).
During playback, the headphones may be used for monitoring. In the position "Tape" the signal
coming from the tape can be heard. In the position "Direct" a mixing of the signals coming from the
microphones and from the tape can be heard. The mixing of these signals can be controlled by
means of the potentiometers "Mike 1", "Mike 2" and "Line and Playback".
To listen to the recording on an external amplifier/loudspeaker installation, connect it to the Line
Output on the right of the recorder. This output receives the same signal as is transmitted to the
headphones. Loudspeaker signals should not be allowed to feed a microphone. Under these
conditions, the signal passes from the loudspeaker to the microphone, which retransmits it,
producing a howling known as the Larsen effect (acoustic feedback).
To avoid this effect, the "Line and Phones" switch should be placed in the position "Tape", or the
potentiometers "Mike 1" and "Mike 2" turned down.
To playback in the headphones or to an external installation, the position "Playback" of the Main
Function Selector should be chosen. The internal loudspeaker is thus disconnected.
2.8 PRECAUTIONS
The pinch wheel is automatically disengaged in the position "Stop" of the Main Function Selector.
This enables the Nagra to be stored with the Pinch Wheel and Tape Guide Control Lever in the
closed position. If this lever is in the disengaged position, the lid of the recorder can not be closed.
Do not store the recorder with the Main Function Selector in any position other than "Stop", as this
will cause a "flat" to be formed on the pinch roller and this will cause Wow and Flutter problems
during future uses. To avoid the accidental discharge of the batteries, put the "Power" switch into
"External", thereby disconnecting the internal batteries (if installed).
If the recorder has to be stored for a long period of time, remove the batteries, as a corrosive liquid
can leak from discharged batteries.