Rogers HG 88 MKII stereo integrated amplifier

Year of manufacture:

1960 - 1964

Manufactured by:

Rogers Developments (Electronics) Ltd., 4-14 Barmeston Road, London, S.E.6.

Price when new (in the UK):

£42 (or without case £38 10.)

Description:

integrated amplifer

Mono/stereo:

stereo

Power output:

12 watts per channel (nominal); 14 watts per channel peak

Harmonic distortion:

0.25% for 12 watts

IM distortion:

1.5%. 50 c/s. and 6,000 c/s. 4:1

Frequency response:

30-20,000 c/s, ± 1 dB

Negative feedback:

16 dB 1 kc/s

Hum and noise:

80 dB below 12 watts

Inputs (sensitivities for 12 watts output):

magnetic pickups: 4 or 80 mV (RIAA)
crystal pickups: 6 or 120 mV
radio: 120 mV
tape heads: 4 or 20 mV (CCIR)
t ape preamplifiers: 20 or 120 mV

Preamplifier overload capacity:

-40dB

Filters:

low Pass Filter - 5-20 kc/s, built-in high-pass filter

Tape output:

100-260 mV

Output impedence:

4, 8 and 16

Tubes:

2 x EF86; 2 x ECC83; 4 x ECL86; 1 x GZ34

Dimensions:

case: 15½ x 10¾ x 7 in. (394 x 273 x 178 mm)
chassis 14 x 10¾ x 5¼ (356 x 273 x 133 mm)

Weight:

case: 27½ Ib with case (12.5 kg)
chassis: 23½ Ib (10.7 kg)

Operating voltage::

200-230-250 v. 50 c/s and 110- 115-125 v. 60/60 c/s, consumption: 95 watts