WONDERFUL ANALOG MASTER TAPE!
SPECIAL ORDER ITEM
Technical Information ATR-MT Bias ChartNote: ATR Master Tape has a wide acceptable bias current vs. distortion tolerance. The above recommendations are to be used as a guide only.
Test Notes: Coercivity Hc 365 Oe Nominal, B-H Retentivity Brs 1590 Gs
Particle Orientation: Longitudinal
Recording Performance References: Recorder Ampex-Aria, ATR-102 Record Head Gap Length 1.0 mil Reproduce Head Gap Length 0.12 mil Track Width 200 mils nominal Tape Speed 30 IPS, 76.2 cm/sec Playback Equalization 17.5 µs, AES Recording Bias 0.5 dB over @ 10 kHz See Bias Current Recommendation1 Bias Frequency 432 kHz Recording Level Reference 185 nWb/m = 0 VU Ampex Operating Level Frequency Pass Band 20 Hz – 20 kHz Equivalent Wavelength of 1.5 inches to 0.15 mils Recording Performance: Maximum Output Level 1 kHz at 3% 3rd Harmonic Distortion 16.5 dB Saturation Output Level 1 kHz 23.5 dB Level at which linearity exceeds 1 dB of input signal 10 kHz 16.1 dB 16 kHz 15.2 dB Maximum Linear Operating Level 9 dB over 185 nWb/m Linear frequency vs output level through pass band. 3rd Harmonic Distortion: 1 kHz Reference 0 dB Reference Operating Level 0.032 % +6 dB over Operating Level 0.096 % +10 dB over Operating Level 0.28 % +12 dB over Operating Level 0.49 % Signal to Noise ratio (Bias Noise) -68 dB ASA , NAB A weighted Peak Dynamic Range 86 dB Dynamic Range Ref. to 1% 3rd Harmonic Distortion 82 dB 1 kHz fundamental Linear Dynamic Range 78 dB Range in which frequency / wavelength response is linear ±0.3 dB tolerance Print-Through Characteristic -60 dB 1 kHz tone on preceding wrap of tape stored for 24 hours on NAB reel at 72º F Physical Specifications: Yield Strength 12 Lbs / half in. Produces 3% elongation of a 6″ test sample Breaking Strength 24 Lbs / half in. Force that will break a 6″ test sample Coating Thickness 0.59 mils Backcoating 0.03 mils Polyester Base Film 1.42 mils Total 2.04 mils Standard widths: 1/4″ 0.246 in. Tolerance +0.0 / -0.002″ 1/2″ 0.496 in. 1″ 0.996 in. 2″ 1.996 in. Backcoating Resistance 30K Ohms Per linear inch by pin probe Oxide Coating Resistance >5M Ohms