Product Overview
ATR Magnetics is an analog tape manufacturing company that has won the respect of audiophiles and pro-audio recording engineers worldwide.
ATR Master Tape Specifications:
- Magnetic Characteristics:
- Coercivity Hc: 365 Oe, BH
- Retentivity Brs: 1590 Gs
- Particle orientation: Longitudinal
- Recording Performance References:
- Recorder: Ampex-Aria ATR-102
- Record head gap length: 1 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 AES
- Recording bias: 1.4 dB over @ 20 kHz
- See Recommended Bias chartbelow*
- Bias osc. frequency: 438 kHz
- Recording Level Reference: 185 nWb/m = 0 VU
- Frequency Pass Band: 20Hz-20Khz
- Equivalent wave length of 1.5inches to 0.15 mils
- Maximum Output Level 1 kHz at 3% 3rd harmonic distortion: 16.5dB
- Saturation Output Level:
- 1 kHz: 23.5 dB
- Level at which linearity exceeds 1 dB of input signal
- 10 kHz: 16.1 dB
- 16kHz: 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 fundamental frequency
- 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
- Peak Dynamic Range: 86 dB
- Dynamic range ref to 1%: 82 dB
- 3rd harmonic distortion
- Linear dynamic range: 78 Db
- Range in which frequency / wavelength response is linear ±0.3 dB tolerance
- Print-through characteristic: -60 dB
- 1K tone on preceeding wrap oftape stored for 24 hours on NAB reel at 72º F
Physical Specifications:
- Yield Strength: 12 lbs / half in
- Produces 3% elongation of a 6" testsample
- 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 inches
- Tolerance +0.0 /-0.002"
- 1/2": 0.496 inches
- 1": 0.996inches
- 2": 1.996 inches
- Backcoating resistance: ? 30K Ohms
- Per linear inch by pin probe
- Oxide coating resistance: >5M Ohms
- Bias Current Recommendation*: 10 kHz signal, 15 ips
- 1 mil gap length (ATR-Aria): 1.2 dB
- 5 mil gap length (Ampex): 3.0 dB
- .25 mil gap length (Studer): 3.5 dB
Note:
ATR Master Tape has a wide acceptable bias current vs. distortion tolerance. The above recommendations are to be used as a guide only.