Grundig R 45 a Bedienungsanleitung Seite 14

Line Output Socket
Socket LINE € is a low impedance/high
level output socket for making high quality
recordings on a tape recorder with a
corresponding line input socket. It is also
possible to connect a mixer or reverbe-
ration unit to the Line output and play
back via the Monitor socket with the
receiver being switched to Monitor
operation (MONITOR switch @ set to top
position). The Line output socket can also
be used to feed another amplifier or
sound-to-light display.
Microphone Connection
The socket ® (see specifications for pin
connection) will accept GRUNDIG
capacitor microphones, dynamic
microphones and high quality balanced
line studio microphones. The transformer
for balanced line microphones is built-in
and can be switched in and out with switch
© underneath the receiver (see label on
this place). By pulling and depressing the
knob @ MICRO the microphone input can
be switched — depending on the type of
microphone used — to stereo or mono.
Microphone and Mixing (MIX)
The operating functions are selected with
control switch @:
© = Microphone and mixer switched off.
AUTOM = Automatic operation:
Eg: for making announcements-
discotheque operation. When talking into
the microphone the volume of the radio,
record, cassette or tape programme is
automatically reduced during the
announcement. The volume of the
microphone announcement is adjusted
with contro! MICRO @.
To avoid acoustic feedback (howling), we
recommend the microphone be used at a
reasonable distance from the loudspeaker,
or do not turn up the volume control ®
too far.
MIX = Mixer operation:
The microphone signa! can be mixed with
any other signal being fed into or out of
the receiver (radio programme, record, tape
or cassette). The mixed signal levels can
be adjusted with control MICRO (for
microphone) and control MIX (for normal
programme). To avoid acoustic feedback,
especially if the mixed programme is being
recorded, the volume control should not
be turned up too far.
14
MICRO = Microphone operation only:
The microphone volume is adjusted with
control MICRO, the basic volume with the
volume contro! @. It is also possible to
connect other signal sources (tape/cassette
recorder, record player with ceramic or
crystal pick-up) to the microphone socket,
provided an appropriate adaptor is used
(see illustr. below).
Thus it is possible to mix any two
programmes with the microphone mixer
unit. The controls (basic volume, level,
Mono/Stereo) must be used
correspondingly.
Pin Connections of Cable
Adaptor for Signal Source
Phono/Tape on Microphone Socket
470kQ
Ss S
x ae.
Socket for 8 S Plug for
Phono or iz "connection
Tape cable to micro-
phone input
Technical Specification
General
Mains supply:
110, 136, 220, 240 V AC 50/60 Hz
Power consumption: approx. 230 W max.,
no-load approx. 30 W.
Fuses:
(Mains)
110/130 V AC: 4 Amp, surge resisting
220/240 V AV: 2 Amp, surge resisting
(Secondary)
1 x 630 mA, surge resisting
1 x 400 mA, surge resisting
1x 63 mA, surge resisting
1x 125 mA, surge resisting
Overload Protection
The circuit has been designed so that it will
sense open and short circuit loading conditions.
It will also sense over capacitive or over
inductive loads and the automatic overload
protection circuit will then operate. Thermal
protection devices have also been fitted to the
mains input transformer and onto the heatsinks
of the output transistors. These transistors
are therefore protected against destruction by
overload and high operating temperatures. Should
a fault condition occur these overload protection
circuits will reset themselves when the fault has
been cleared. E
An electronic speaker protection circuit prevents
destruction of loudspeakers.
Radio Unit
Waveband Coverage:
FM: 87.5- 108 MHz
MW: 510 - 1620 kHz
Sensitivities:
VHF/FM: 1 pV in 300 Q or 0.5 nV in 75 Q and
40 kHz deviation for 26 dB noise.
MW Band 6 - 15 pV Noise + Signal
Noise
(modulation depth — 30%)
= 6B.
Aerial Sockets:
FM: FM dipole 300 Q
AM: Externa! Aerial and Earth
Circuits:
FM: 17 (3 variable, 1 fixed, 7 fixed IF, 4 ceramic
filters, 1 trap 114 kHz)
AM: 8 (2 variable, 2 fixed IF, 4 ceramic filters)
Intermediate Frequencies:
FM: 10.7 MHz
AM: 460 kHz