SCR-51 (140-1068) Specifications Faxback Doc. # 8623 Tape System.................................................4-track, stereo (for use with normal bias tape only) Tape Speed:........................................1-7/8 ips. (4.75 cm/sec) Wow and Flutter................................................0.25% (WRMS) Signal-to-Noise Ratio:................................................42 dB Erase System:........................................................Magnet Record System:......................................................AC Bias Power Requirements:.........................DC-2 size AA Penlight batteries (3 volts DC) Or, from a vehicle's cigarette lighter socket with a 270-1560A DC Auto Adapter AC-120 volts with a 273-1654 AC Adapter Size:..................................5-1/8" (H) x 3-3/8" (W) x 33 mm (D) Weight ..................................14 oz. (260 g) (without batteries) (RLR-11/05/93)