Philips N4307 - General Description of Models; Mains Supply; Inputs; Outputs

General Description: These models, utilising an electrically similar
chassis, are four-track, two-speed, mains-operated, tropicalised tape recorders,
employing ten transistors and three diodes. Recording facilities include signal
input mixing, loudspeaker or headphone monitoring and a meter-type
recording level indicator. Provision is made for using the recorder as a
microphone, radio, or pick-up amplifier and, when used in conjunction with
the “Stereo”’ pre-amplifier EL3787A/ooA etc., Stereo playback/Multiplay/
Duoplay 1s also possible.
Mains Supply: 110, 127, 200-25o0volts A.C.; Frequency.
Response: 60-14,000 Hz at 3 1.p.s., 80-8000 Hz at 1$ i.p.s.
Inputs: Sktr—Radio (diode). Pins 1/4 and 2.—2mV into 20K.—Pick-up.
Pins 3 or 5 and 2.—100omV into 1M. Skt. 2—Microphone. Pins 1/4 and 2.—
o-2mV into 2K.
Outputs: Sktr—Line (diode) Pins 3, 5 and 2—750mV across 20kQ;
Skt3—-Stereo; Sktq—Ext. L.S. Impedance 4 or 8Q, 4 watts; Skts—Head-
phones Pins 4 and 1/2.
Case Removal: Remove lid, pull off the four control knobs, speed change
knob and undo the four (some models have five) ornamental screws. Take off
cover plate, disconnect the speaker leads and case screening lead (these are
usually slide-on connectors but in some cases may be soldered) and lift out
chassis. ‘The chassis can be operated out of the cabinet, providing normal care
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