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Year of manufacture: 1960-1963 (LK-72) 1963-1966 (LK-72B)
Manufactured by: H. H. Scott Inc. Powdermill Rd, Maynard, Massachusetts, U.S.A
Price when new (in the USA): LK-72: $149.50 (kit); metal case: $12.95, wooden case: $19.95
Description: integrated amplifier kit
Mono/stereo: stereo
Power output: 40 watts RMS per channel, 32 watts with both channels operating
Harmonic distortion: 0.8%
Intermodulation distortion: 0.3%
Frequency response: 20 - 20,000 cps (±1dB)
Hum and noise: -80dB (test results show -79dB on high level inputs, better than 60dB on low level)
Output impedance: 4, 8 or 16 (switchable)
Input sensitivity (for 40 watts output): 0.85V (high level inputs); 16mV RIAA phono input, 7.6mV on NAB tape head input
Tubes: 4 x 12AX7; 2 x 6U8/6GH8 (Split-load phase inverter); 4 x 7591 (output); 1 x )5AR4/GZ34 (rectifier)
Dimensions: 12½ in. x 15¼ in. x 4¾ in. (318 x 387 x 119 mm)
Weight: 26 lbs (11.8 kg)
Power consumption: 105-120 volts 50 - 60 c/s