MIL-PRF-25670/1B
NOTES:
1. Dimensions are in inches.
2. Unless otherwise specified, tolerance is ± .010 (0.25 mm).
3. Metric equivalents are given for information only.
4. Set-screws shall hold the earphone securely to the wire contacts, shall
be slotted (for interchangeability of spares among manufacturers and
service applications), and shall be recessed.
Inches
mm
Inches
mm
Inches
mm
.003
0.08
.125
3.18
.422
10.72
.015
0.38
.161
4.09
.437
11.10
.016
0.41
.187
4.75
.593
15.06
.062
1.57
.195
4.95
.785
19.94
.093
2.36
.218
5.54
.853
21.67
.109
2.77
.390
9.91
1.820
46.23
1.986
50.44
FIGURE 1. Earphone element, H-136/AIC Continued.
Frequency
100 Hz
1,050 Hz
2,000 Hz 4,500 Hz
points
Upper
+4.0
+4.0
+4.0
+4.0
limits (dB)
Lower
-1.0
-1.0
-6.0
-6.0
limits (dB)
FIGURE 2. Ground level frequency response envelope for earphone element, H-136/AIC.
2
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