| 1974 Ferrograph Logic 7 |
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It was the Japanese who introduced the concept of vertical operation, and fired the imagination of the average enthusiast, these looked more professional, and were bought because of their looks as much as anything else. Ferrograph were slow to respond to this challenge, when they did it was too little too late. The introduction of the Series 7 in the late 1960's was ill conceived, and poorly implemented. The later Super Seven tried to address some of the shortcomings, but it was too late to repair their damaged reputation. Enthusiasts who had always used Ferrographs moved their allegiance to Revox, Tandberg, Sony, Teac, and Akai. |
The introduction of the "Logic 7" in 1974, solved most of the problems, but it arrived too late. This was probably the best of the Ferrograph recorders, apart from the "Studio 8", and compares with the best available, in terms of quality and facilities, and sex appeal. But again too late to make amends. The Logic Seven is the machine that should have replaced the Series 6, well, in theory anyway. At the time the original Series 7 was launched, some of the technology incorporated into this model wasn't readily available. In any event, the Logic 7 ranks as probably the best conceived Ferrograph since the first, still some shortcomings, but we can forgive those few. Regular 'Get Reel' contributor and avid collector Stuart Blacklock owns one of these recorders and writes:
Additional images, user manual and circuit diagram for this recorder are featured on the CD-ROM. |
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| Specifications at a glance |
Model |
Logic 7 |
Year |
1974 |
Price when new (in the
UK) |
varied from £295 - £350 depending on options |
Track system |
half and quarter-track stereo versions available |
Heads |
three separate heads for erase, record & playback |
Motors |
three |
Maximum reel size |
10½" |
Tape speeds |
15 ips, 7½ ips and 3¾ ips |
Frequency
response ( |
15 ips: 30Hz - 20kH |
Wow & flutter |
less than 0.08% at 15 ips, less than 0.10% at 7½ ips |
Signal to noise ratio |
better than 60dB (unweighted, including hum) ref. 2% distortion |
Channel separation |
better than 50db |
Distortion |
less than 0.25% |
Rewind speed |
approx 2 min for 1800ft, 3 min for 3600ft |
Audio output power |
10 watts RMS per channel into 8 ohms |
Inputs |
microphone: 200µV - 50mV, 200 - 1000
ohms line: 50mV - 7V at 2 Mohm |
Outputs |
300mV into 10kohm line, Stereo phones & extension speakers |
Dimensions |
20½ x, 17½ x 10" (521 x 444.5 x 254mm) |
Weight |
58 lbs (26kg) |