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Year of manufacture: 1954 - 1959
Manufactured by: RCA Photophone, Sunbury-On-Thames, England (an associate of Radio Corporation of America)
Price when new (in the UK): £24 10s
Description: power amplifier
Mono/stereo: mono
Power output: 12 watts (RMS) 20 watts peak
Harmonic distortion: less than 0.1% at 10 watts at 700c/s
Frequency response: 20-25,000 c/s within 0.2dB; 10-60,000 c/s within 0.5dB;
Noise level: 85dB below 12-watt level
Input sensitivity: 1.2V for 12 watt output
Input impedance: 470K
Output impedance: 4, 7 or 15
Damping factor: variable from negative to positive values through infinity
Tubes: 2 x EF86 (6267), 2 x KT66 (6L6G), 1 x GZ32 (5U4G) rectifier
Controls: hum control and damping factor control
Dimensions: length 15¾ in., height 7½ in., depth 7¾ in (400 x 190.5 x 197 mm)
Weight: 33 lb (15 kg)
Power for external loads: 395V 45mA D.C; 6.3V 2.5A A.C.
Power consumption: 135 watts
Power supply: 100 - 150V., 200 - 250V AC, 50 - 60 c/s