Country of Manufacture:USA
Speeds: 3 3/4, 7 1/2, 15
Max Reel Size("): 3"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(±2dB): 7½ ips: 40Hz -15kHz
Wow and Flutter:less than 0.12 % at 7½ips
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
Unlike some of the earlier Roberts machines, the 997 didn’t appear to have an exact equivalent Akai counterpart, however it does appear to be something of a hybrid between the M-6 & M-7.
It featured twin VU meters, stacked amplifiers, mute monitor speaker switch, horizontal or vertical operation, in-built speakers with deflectors, inputs for stereo
record changer and AM/FM stereo tuner as well as microphones, auto shut-off and three tape speeds (up to 15 ips).
Drive was via a single 24-slot high-torque hysteresis-synchronous motor with a dynamically-balanced rotor & flywheel.
Price when new was $449.95
Cross-talk: 80 db at 1kHz / Valve complement: 2 x 6267 (EF86), 2 x 12AD7, 2 x 6BQ5, 1 x 6AR5, 2 x 6X4 / Rewind speed: 2½ minutes for 1,200 ft reel / Audio output power: 6 watts per channel / Inputs: Low level high impedance mic input, high level line input / Outputs: High impedance head output, 8 / 16 ohm amplifier output / Speaker(s): 2 x 8″ coaxial extension speakers (optional) / Dimensions: 14 x 20 x 9″ (356 x 508 x 229 mm) / Weight: 50 lbs (22.72 kg) / quarter-track stereo