G. This Headset-Microphone Kit is designed to fit both the regular and large size Combat Vehicle Crewman\'s Helmet. The electrical characteristics of the kit are compatible with Tactical Radio Systems, such as the VRC-12.

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MIL-DTL-55535A

Inches

.015

0.38

.250

6.35

1.000

25.40

5.310

134.87

6.38

162.05

7.000

177.80

7.500

190.50

9.19

233.43

11.00

279.40

15.38

390.65

16.00

406.40

27.00

685.80

NOTES:

1. Dimensions are in inches. Unless otherwise specified, tolerances shall be � .015 inch.

2. Metric equivalents are given for information only.

3. All acoustic damping material will be equivalent or better than Akoustikos felt and Acousti-celetox.

4. See drawing SC-D- 621083 (CAGE 80063), for more details.

FIGURE 3. Signal to noise ratio test box for differential microphones.