Country of Manufacture:Japan
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Quad
# Motors: 1
Frequency Response:( 3dB): 7½ ips: 30Hz to 22 kHz
Wow and Flutter:less than 0.12% at 7½ ips. less than 0.15% at 3¾ ips
Signal-to-Noise Ratio:better than 50 dB at 7½ ips
Sound quality rating:5 / 10
Long-term reliability rating: 6 / 10
The 1730D-SS was a four-channel surround sound single motor deck, an evolution of the 1700 series. Featuring two speeds, (7½ and 3¾ ips) it had four separate input levels, four microphone inputs and two headphone outputs.
It featured a three head system with an additional full track erase head and monitor switches enabled source/tape comparison during recording. Other features included a four-digit counter, auto shut-off and built-inreel retainers.This was a popular unit due mainly to its ‘nice’ price ($600 in the USA).
equalisation: correct playback to NAB curve / Distortion: less than 1.5% at 7½ ips (1,000Hz at “0” VU recording) / Erase ratio: better than 70dB / Bias frequency: 100kHz / Semi-conductors: 19 transistors, 6 diodes, 8 linear ICs / Inputs: 4 x Microphone: 0.4 mV impedance 30 Kohms 4 x Line: 40 mV impedance 100 Kohms 2 x DIN: 5mv / Outputs: 4 x Line: 1.228V max. load impedance more than 20 Kohms 2 x Din: 0.4V 2 x Headphones (front and rear) : 100 mV at 8 ohms / Rewind speed: 75 seconds for 1200ft at 60Hz, 90 seconds at 50Hz / Dimensions: 17¾ x 16½ x 9½ ” (450 x 420 x 240mm) / Weight: 33 lbs (15 kg) / quarter-track, four channel surround sound and quarter-track stereo