Country of Manufacture:USA
Release dates:1954 - 1957
Speeds: 7 1/2, 15
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(all 2 dB): 15 ips: 50Hz - 15kHz
Wow and Flutter:less than 0.1 % 15 ips, less than 0.2% at 7½ ips
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
The PT7A was a professional, three-head twin-track mono recorder available in rack, case or console. It appears to have been a short-lived interim model between the P6 and the PT-60 as there is no mention of it in any trade magazines or directories, only in a 1954 Magnecord catalogue.
Reel capacity was 10½ inches and tape speeds were 7½ and 15 ips. Speed change was electrical and start/stop was almost instantaneous (0.1 seconds)
Tape lifters were used to lift tape from heads when rewinding or fast forwarding.
The heads were triple-shielded to reduce cross-talk and hum, and could be removed or aligned separately
Control of transport functions (forward, stop, rewind & hi-speed) was by means of interlocked pushbuttons and could be controlled remotely.
Rewind speed: 30 seconds for 1,200 ft reel / Dimensions: PT7-T tape deck panel size: 19 x 10½ inches (483 x 267 mm) PT7-C amplifier 19 x 7 inches (483 x 178 mm) / Weight: tape mechanism: 42 lbs (19.1 kg), amplifier: 32 lbs (14.5 kg) PT7-C amplifier 26 lbs (11.8kg) / half-track mono