Model:37 37R Sound Reel
Country of Manufacture:USA
Release dates:1951 - 1954
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(all 3 dB): 7½ ips: 80 - 8.5kHz
Signal-to-Noise Ratio:45db at 7½ ips. 40dB at 3¾
Sound quality rating:5 / 10
Long-term reliability rating: 5/ 10
A dual-track, dual speed recorder with a single heavy-duty motor, the Masco 37 series took up to 7″ reels and had separate inputs for microphone or phono. The 37R model had a built-in radio from which recordings could be made. The push-button speed changer automatically adjusted equalization.
Outputs included an extension speaker (8-16 ohms) and an external amplifier (500 ohms). An internal 6 x 9″ speaker was driven by a 5-watt amplifier. A neon record level indicator gave a peak level reading and the unit was
finished in two-tone tweed and calf-trim “fibrinoid”.
Hum level: 50dB below full output power / Valve complement: 6BA6 – R.F. amp. 6BE6 – convert or. 6SF7 – IF amp – detector – AVC. 12AX7 – playback pre-amp. 6SL7GT – mic pre-amp – 1st AF amp. 6NL7GT – 2nd AF amp – monitor amp. 6V6GT – bias oscillator – power output. 6X5GT – rectifier / Rewind speed: 3 minutes for 1,200 ft reel / Audio output power: 5 watts / Inputs: microphone – 1 megohm impedance, .003 volts sensitivity radio-phono – 0.5 megohm impedance, 9.4 volts sensitivity / Outputs: external speaker – 8-16 ohm, 5 watts external amplifier – 500 ohm, 1.7 volts to line or amplifier / Speaker(s): 6 x 9″ elliptical / Dimensions: 12½ x 15 x 10″ high (317 x 381 x 254 mm) / Weight: 34½ lbs (15.7kg) / half-track mono