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)