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ELECTRICAL SPECIFICATIONS
Frequency Response
+0.5 to -0.5 dB, 20Hz to 20,000Hz
Distortion Less than 0.2% at 10 volts output
Less than 0.02% at 3 volts output
Input Sensitivity (phono 1, phono 2, tape head) 2 millivolts for 2.5 volts output at 1kHz
Input Sensitivity (Microphone) 2.5 millivolts for 2.5 volts output
Input Sensitivity (aux, tape, tuner) 0.25 volts for 2.5 volts output
Hum And Noise (phono 1, phono 2, tape head) 74 dB below 10 millivolts input
Hum And Noise (aux, tape, tuner) 85 dB below rated output
Output (main) 2.5 volts with rated input. Up to 10 volts
can be developed without distortion.
Output (tape) 0.25 volts with rated input. Phono inputsignal of 10 millivolts produces 1.25 volts
output.
Output (L & R) 1.0 volts with rated input on both channels.
A level control adjusts output.
Bass Control
+20 dB at 20Hz
Treble Control
+20 dB at 20,000Hz
LP Filter
Flat or sharp cutoff below 50Hz (down 30 dB @ 20Hz).
HF Filter
Flat or sharp cutoff above 5000Hz (down 30 dB @ 20,000Hz).
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PREAMP. SECTION
154 - 318
Unless otherwise specified, resistance values are
in
ohms,
1/2
watt,
and 10%
tolerance. Capacitance
values smaller than 1 are in microfarads (µF);
values greater than 1 are in picofarads (pF).
Resistors marked with * are 1/4W.
The terminal numbering of rotary switches and printed circuit board wires is for reference only.
All voltages are measured under the following condi- tions:
1. Use of an 11 megohm input impedance VTVM
2. All voltages ±10% with respect to ground 3. AC input at 117 volts, 50/60 cycles
4. No signal at input terminals
5. Front panel controls at normal positions
