Philips N 4420 Manual page 5

closures for the right and left hand channels
respectively, impedance 4-8 Ohms. Inserting a plug
will automatically disconnect the corresponding
built-in loudspeaker.
Use of microphones
For microphone recordings you can connect two
microphones, one to socket and the other to
socket @9).
Depending on the position of track selector @9, the
recordings made in each case will be either stereo
(position 'ST') or mono (position 1-4' or '3-2').
For mono recordings you can, if desired, connect
only one microphone to socket @é) or @9).
For stereo recordings the microphone for the left
channel must face the left and that for the right
channel the right of the sound source.
For speech recordings the distance between
mouth and microphone should be about 30 cm. For
music recordings, trial recordings should be made
to determine the best distance.
To prevent unwanted recorder noise being picked
up by the microphones, these should be placed
away from the recorder.
Listening-in during recording (monitoring)
You can check what is going onto the tape by
monitoring during recording.
Monitoring through headphones is of particular
advantage when making microphone recordings
since it averts the danger of the microphone picking
up sound from the loudspeakers and thus causing
a whistling noise ('howling' or acoustic feedback').
By means of monitor selector @3, which operates
only during recording, you can choose between
tape- and source-monitoring.
— 'tape-monitoring': The signal which the record
head ©) (fig. 7) has put on the tape is reproduced
immediately afterwards by the playback head ©
(fig. 10). Thus what you then hear is the signal as
recorded. Note that with the tape stationary (the
pause key being engaged), the playback head gives
no signal and so nothing is heard.
— 'source-monitoring': In this case what you hear
is the signal as it sounds before the record head has
put it on the tape (fig. 10). With the tape stationary
(the pause key being engaged), the signal as it
sounds prior to recording is continuously heard.
Set monitor selector @ to 'source' if the tape is
stationary or to 'tape' if the tape is running.
@ Adjust the volume, balance and tone via the
controls (14 43) 68) 69. When monitoring through an
external amplifier, the volume etc. is adjusted using
the amplifier's integral controls.
Introduction to recording
@ Copying of gramophone records and recording
of radio programmes is permissible only insofar as
copyright or other rights of third parties are not
thereby infringed.
@ The strength at which the sound is recorded on
the tape determines the quality of the sound
obtainable on playback. The 'recording level', as
this is called, is adjusted with the recording level
controls 43 (3, and checked by reference to the
recording level meters (@d and @ in the case of
stereo recording or either of those meters in the
case of mono recording.
In mono recording with one microphone, control @3
must be used when recording from socket @8) and
control @ when recording from socket @. The
unused control must be at '0'.
@ The recording level is correctly set if, during the
loudest passages, the pointers of the recording
level meters (9 and/or (i) deflect just to the 100%
mark (fig. 5). If the level is too high or too low, either
distortion or disturbing tape noise, respectively, will
be heard on playback.
Note: Depending on the kind of tape which is used,
the recording level meter deflection obtained dur-
ing tape-monitoring and during playback may differ
from the deflection obtained during source-moni-
toring. However, in order to obtain optimum record-
ing quality, the recording level should be set using
the deflection obtained during source-monitoring.
@ During recording, any previous recording on the
same part of the tape is automatically erased by the
erase head @) (fig. 7). You can, however, erase a
recording without adding a new one by keeping the
recording level controls at '0' as you record.
Erasure is fastest with speed selector @4) at '19'
cm/s. :
@ During the making of microphone recordings,
any apparatus connected to socket @§) must be
switched off. During the making of recordings via
socket @), no microphones must be connected. To
prevent unwanted noise being recorded, sockets
not in use should not be touched during recording.
Recording
@ Connect the sound source from which you wish
to record to the appropriate socket.
@ Set speed selector @4 to the speed desired. The
lowest speed gives the longest playing time, the
highest speed the best sound quality.
@ Set track selector @3 to stereo ('ST') or - for
mono recordings - to '1-4' or '3-2'.
@ Set monitor selector @ to 'source'.
e@ Press pause key
@ Press start key (@@ and record key @ at the same
time.