Country of Manufacture:Switzerland
Release dates:1976 - 1980
Speeds: 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Stereo
Frequency Response:( 2dB): 50Hz - 15kHz at 7½ ips
Sound quality rating:7 / 10
Long-term reliability rating: 7/ 10
A portable battery/mains,
full-track mono recorder available in either a two speed version or single
speed version. The single speed version (IS-L) operated at 19 cm/s (7½ ips) whilst the two speed version (IS-LT) had the additional speed of
9.5 cm/s (3¾ ips).
Transport consisted of three servo-controlled motors which enabled fast
forward/rewind (unlike earlier Nagras) and the recorder had a maximum
reel size of 127mm (5″).
Speed regulation: at 19 cm / s: 0.1% / Wow & flutter (RMS): 0.12% DIN-weighted / Signal to noise ratio (ASA): ‘A’ weighted NAB equalisation and 3M 206 tape – better than 66 dB / Harmonic distortion: at 400 Hz, 3rd harmonic less than 1% / Audio output power: 300 mW / Inputs: 200 ohm, maximum sensitivity 0.2 mV Condenser mic: (T +12V), maximum sensitivity 1 mV Unbalanced line: 218 mV, 100 kohm / Outputs: Balanced line out: 4.4V >600 ohm / Dimensions: 10.8 x 7.9 x 3.15″ (275 x 200 x 80mm) / Weight: (incl batteries & tape) 9.9 lb (4.5 kg) / full track mono