Four Track Stereo Tape Recorder
The Roberts 990 is a four track, stereo tape recorder which will record and playback four track stereo, and four track monaural tapes. It will also playback two track stereo tapes.
It operates at tape speeds of 15, 17-1/2 and 3-3/4 ips with equalization provided.
Track system: 4-track, 2-channel, stereo/monaural system
Heads: 1 x playback/record, 1 x erase
Reel size: 3, 5 or 7 inch reel
Tape speeds: 3 3⁄4 7 1⁄2 15 ips
Wow and flutter: 0.12% (7 1⁄2 ips)
Frequency response: 40Hz to 15kHz (7 1⁄2 ips)
Signal to Noise Ratio: 50dB
Valve complement: 6AR5, 6BQ5, 6X4, 12AD7, 6267
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