PTM-7, Restorers TD-206 and on Shelters of Low, Medium and High Capacity, Tropo Subsystems of Army Area Communications Systems.

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MIL-DTL-55661C

3.9.3 Insulation resistance (IR). Insulation resistance shall be not less than 50,000 megohms between

the center and outer contacts of each coaxial element and between the outer contacts of the coaxial

elements when tested in accordance with 4.6.3.

3.10 Environmental requirements.

3.10.1 Rotation. The torque required to rotate the coupler shall not exceed 0.75 inch�pounds when

tested in accordance with 4.7.1.

3.10.2 Salt spray. After subjection to the test specified in 4.7.2, the plating shall remain intact and the

connectors shall show no evidence of deterioration and in addition Connector UG-1870( )/U shall meet the

requirements of 3.10.1.

3.10.3 Thermal shock. The connectors shall meet the requirements of 3.9.1, 3.9.2 and 3.9.3 after

being subjected to the test specified in 4.7.3. There shall be no evidence if deterioration.

3.10.4 Shock. The connectors shall withstand the shock test specified in 4.7.4 without damage or

loosening of parts and shall meet the requirements of 3.9.1, 3.9.2 and 3.9.3.

3.10.5 Shock drop. After being subjected to the test specified in 4.7.5, there shall be no damage and/or

loosening of parts and the connectors shall be mechanically operable. Any physical damage shall be

minor and shall meet the requirements of 3.9.1, 3.9.2 and 3.9.3.

3.10.6 Vibration. The connectors shall withstand the vibration test specified in 4.7.6 without damage or

loosening of parts and meet the requirements of 3.9.1, 3.9.2 and 3.9.3.

3.10.7 Pull. While being subjected to the test specified in 4.7.7, there shall be no loss of continuity of

either center conductor or conductor braid. The cable and the connectors shall also meet the

requirements of 3.9.1, 3.9.2 and 3.9.3. Locking devices shall not become detached from the connectors.

3.10.8 Water immersion. There shall be no deterioration or evidence of water leakage in the connector

and the connector shall meet the requirements of 3.9.1, 3.9.2 and 3.9.3 (see 4.7.8).

3.10.9 Moisture resistance. After being subjected to the test specified in 4.7.9, the assemblies shall

meet the requirements of 3.9.1, 3.9.2 and 3.9.3 except that the IR shall be a minimum of 100 megohms

during cycling and a minimum of 10,000 megohms after 24 hours drying. The connectors shall show no

evidence of deterioration.

3.10.10 Temperature cycling. During the test specified in 4.7.10, the connectors shall be electrically

continuous and meet the requirements of 3.9.1, 3.9.2 and 3.9.3 and shall show no evidence of

deterioration.

3.11 Workmanship. The connectors shall meet the applicable portions of the following (see 4.9):

a. Cast and molded parts (see 3.3).

b. Soldering (see 3.4).

c. Cleaning (see 3.5).