Integrated Cartridge and Reel Recorder
The model 778X employs the 8-track stereo system on the cartridge. The tape has a total of eight tracks, two of which are used at a time for stereophonic recording or playback. There are four choices of channels for stereophonic recording and playback. When the tape comes to an end, the next channel is automatically set in position for recording or playback.
Recording or playback time for one channel is 15 minutes, and continuously 60 minutes for four channels when using a 300-foot cartridge tape. Any desired channel may be easily selected by manually pushing the cartridge program selector button.
On conventional heads, the signal and the bias are applied to the same recording head. Therefore the components, especially the high frequency component, of the signal being recorded tend to be attenuated or erased by the effect of the bias field.
On the Cross Field System, the signal head and bias head are separate and mounted opposite one another with their centers slightly displaced so the recorded signal is free from the undesirable effect of the bias field. The tape can therefore be modulated over the entire frequency spectrum with maximum fidelity.
The 778X has Hi-Fi stereo sound from a high capacity 12 watt solid state amplifier and high compliance speakers, playable in a vertical and horizontal operation.
Track system: 4-track, 2-channel, stereo/monaural system
Heads: 1 x playback/record, 1 x erase, 1 x bias
Motor: 2 speed induction
Reel size: up to 7 inch reel
Tape speeds: 1 7⁄8 3 3⁄4 7 1⁄2 15 ips
Wow and flutter: 0.18% (7 1⁄2 ips)
Frequency response: 30Hz to 23kHz (7 1⁄2 ips)
Signal to Noise Ratio: 50dB
Total harmonic distortion: 2%
Input: 60mV (line), 0.5mV (mic)
Output power: 6 watts
Speakers: 2 x 4 inch extended range
Semiconductors: 19 x transistors, 13 x diodes
Dimensions: 15 x 13.5 x 9.5 inches
Price: USD $429.95
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Roberts Reel to Reels