MIL-DTL-55041F
3.3 Design and construction. Waveguide switches shall be of the design, construction, and physical dimensions
specified (see 3.1).
3.3.1 Operating frequency range. The frequency range shall be as specified (see 3.1).
3.3.2 Operation. Switches shall be either manually or electromechanically operated.
3.3.2.1 Operating voltage. When applicable, the nominal operating voltage shall be as specified (see 3.1).
3.3.3 Configuration. Switches shall be furnished with the number of positions specified (see 3.1).
3.3.4 Threaded parts. All threaded parts shall be in accordance with FED-STD-H28. Inserts shall be provided
when added thread strength and life is needed for mounting holes.
3.3.5 Diode suppression. When a diode is used for radio frequency (RF) noise suppression, it shall be protected
by another diode such that applying reverse polarity to the actuating circuit does not cause excessive current flow in
the suppressing diode. Unless otherwise specified, all suppressing diodes shall be mounted inside the switch body.
3.3.6 Waveguide and connector cover. The connector and waveguide opening of the switches shall be sealed
with covers to prevent damage and the entrance of moisture and foreign material during storage.
3.3.7 Connectors. The connector receptacle shall conform with SAE-AS50151, MIL-DTL-38999, or
MIL-DTL-83723. All connectors shall have their metallic shells grounded to the switch metallic casing.
3.3.8 Waveguide flanges. The waveguide flange faces and mounting holes shall mate with waveguide flanges
conforming with MIL-DTL-3922.
3.3.9 Solder terminals. Solder terminals shall be in accordance with best manufacturing practices.
3.3.10 Indicating circuits (see 6.4.4). When specified (see 3.1), switches shall be designed with separate contacts
and terminals to operate a pilot light or other device which shall indicate each position of the switch.
3.3.11 Interlock circuit. When specified (see 3.1), switches shall be designed with separate contacts and terminals
to operate or control the output of a transmitter or other RF power source, during switching or at any one of the switch
positions. Interlocks shall be activated before rotor has traveled less than 6 degrees across the waveguide opening.
3.3.12 Finish. Unless otherwise specified (see 3.1), the finish shall be as specified in 3.3.12.1 and 3.3.12.2.
3.3.12.1 Waveguide flange face surface. The flange face surface of the switch shall be finished to 63
root-mean-square microinches in accordance with ASME-B46.1. Aluminum flange face shall be coated with a
chromate-type conversion coating in accordance with MIL-DTL-5541, class 1A.
3.3.12.2 Exterior surface. All exterior surfaces of the switch, except flange faces and connectors, shall be painted
in accordance with MIL-PRF-23377 and MIL-PRF-22750.
3.3.13 Temperature range. The temperature range shall be as specified (see 3.1).
3.3.14 Weight. The weight shall not exceed the limit specified (see 3.1).
3.4 Screening. All screened switches produced to this specification shall be screened in accordance with table III
and 4.7.2. After screening, the switch shall be subjected to group A inspection.
3.5 Run-in. All electromechanically operated switches produced to this specification shall be run-in in accordance
with 4.7.3.
3.6 Pull-in voltage (see 6.4.6). When electromechanically operated switches are tested as specified in 4.7.4, the
pull-in voltage value shall not exceed the value specified (see 3.1). The measured pull-in voltage at the highest
operating temperature shall not exceed the maximum specified value (see 3.1) by more than 10 percent.
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