Country of Manufacture:USA
Release dates:1963 - 1966
Speeds: 3 3/4, 7 1/2, 15
Max Reel Size("): 10.5"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(all 2 dB): 15 ips: 20 - 30kHz
Wow and Flutter:56dB at 15 ips, 54dB at 7½ ips and 51dB at 3¾ ips
Sound quality rating:8 / 10
Long-term reliability rating: 8/ 10
The 700 series had a claimed record and play response of 20Hz – 30kHz 2db at 15 ips. Circuitry was all-tube and the recorder employed a three-motor transport system. This was a truly professional machine available in full-track (701), half-track mono (702), half-track stereo (712 – pictured) and four-track stereo (714C).
Braking was of the differential-magnetic type and the machines featured automatic stop, separate bass and treble boost on both record and playback, d.c. valve filaments, three speed record/play equalisation and impressive
specifications (see below)
Speed accuracy: 99.8% / Total harmonic distortion: less than 1.5% / Controls: forward, stop, play / record, thread / idle, rewind, bias lock, treble, bass (record or play), equalisation (3 speeds), reel-size switch / Rewind speed: 38 seconds for 1200 ft / Inputs: microphone and phono / Outputs: cathode follower / see above