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Year of manufacture: 1957-1959
Manufactured by: H. H. Scott, Inc., 385 Putnam Avenue, Cambridge, Mass. USA
Price when new (in the USA): $199.50
Description: power amplifier
Mono/stereo: mono
Power output: 65 watts long-time continuous, 80 watts undistorted music power, 160 watts peak
harmonic distortion: less than 0·5% at full power; less than 0.1% at 20 watts
Intermodulation distortion: 0.1% first order difference-tone at at rated peak
Frequency response: flat from 12Hz -60kHz with stable controlled cut-off at both ends
Hum: 90 dB below rated output
Output impedance: terminals for 4, and 16; also 70V output for sound distribution system
Damping factor: Damping control for adjustment of output impedance between 3% and 200% of load impedance
Input sensitivity: two inputs (0.2 and 0.5 megohms) requiring 0.5 and 1.5V input respectively for full output
Tubes: 3 x 12AX7 (ECC83) floating para-phase inverters w/AC balance pot; 4 x EL34 (6CA7) output; 1 x 6BX7 voltage regulator; 1 x 6AL5 bias regulator; 2 x 5U4 dual rectifiers
Dimensions: 18 in. x 13 in. x 6½ in. (457 x 330 x 165 mm)
Weight: 45 lbs (20.5 kg)