Manufactured:      Circa 1950

Manufactured by:            H. J. Leak & Co., Ltd Brunel Road, Westway Factory Estate, London W3

Description:           power amplifier

Mono/stereo:        mono

Power output:       12 watts RMS maximum

Total harmonic distortion:       0.1% at 10 Watts output (± 1dB) at 1,000 c/s

Frequency response:      ±0.5dB 20-20,000 c/s

Loudspeaker impedances:       any impedance between 3 and 20- output transformer adjustable for 16, 8 & 4

Hum and noise:    82 Db, ± 3dB, below 12 watts with a source impedance of 25K

Input sensitivity:  an input of 125mV at 1,000 c/s gives 12 watts output

Input impedance:            1M, plus approximately 5 mmfd

Damping factor:    25, measured at 1,000 c/s

Tubes:

First stage:              EF36

Second stage:         ECC33

Output stage:         Two 6L6

Rectifier:                  GZ32

Stability margins: gain - 10dB ± 3dB; Phase - 20° ± 10°

Dimensions:           10 x 11 x 6 ins (254 x 200 x 152 mm)

Weight:        14.5 lbs (6.58 kg)