Technical Information

Magnetic Characteristics: 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
Bias Current Recommendation1 10 kHz @ 15 IPS 10 kHz @ 30 IPS
1.0 mil Gap Length (ATR-Aria) 1.0 dB 0.5 dB
0.5 mil Gap Length (Ampex) 2.0 dB 1.0 dB
0.3 mil Gap Length (MCI) 2.5 dB 1.2 dB
0.25 mil Gap Length (Studer) 3.0 dB 1.5 dB

1 Note: ATR Master Tape has a wide acceptable bias current vs. distortion tolerance. The above recommendations are to be used as a guide only.