MIL-PRF-49118B(CR)
document, however, supersedes applicable laws and regulations unless a specific exemption has
been obtained.
3. REQUIREMENTS
3.1 First article. When specified in the contract or purchase order the contractor shall
furnish first article units in accordance with 4.2.
3.2 Materials. The contractor shall select materials that are fully capable of meeting all of
the operational and environmental requirements specified herein. The materials specified in the
applicable drawings are recommended, but are not mandatory. Selection criteria of the class,
grade or type part shall be that the material will be able to perform its intended function when it
is assembled. Verification of the supplier meeting the overall performance requirements shall
be the governing acceptance standard. Recovered materials shall be used to the maximum
extent possible.
3.3 Design. The Receiver-Transmitter RT-1133( ), PRC-70, hereafter referred to as the
"Radio Set" shall meet the requirements as specified herein.
3.3.1 Weight. The total weight of the Radio Set shall not exceed 21 pounds when
weighed with a scale having an accuracy of 1% or better.
3.3.2 Dimensions. The Radio Set shall meet the dimensions and dimensional tolerances
of DL-SM-B-745600 nd DL-SM-B-745601 to ensure proper physical interface with previously
existing hardware.
3.4 Mechanical. The Radio Set enclosure and front panel controls shall possess the
following physical characteristics:
3.4.1 Finish. The Radio Set finish shall be able to withstand chipping, cracking or
peeling and shall protect against corrosion when subjected to the environmental requirements
herein.
3.4.2
3.4.2.1 Air seal. When tested in accordance with 4.535, a vacuum of 1.0 psig is applied
to the inside of the case.
3.4.3 Front panel. All rotary switches and controls shall be located on the front panel and
shall be readily accessible and resistant to physical damage when in use.
3.4.3.1 Controls. All rotating switch controls shall withstand a force of ten (10) inch-
pounds in each direction without permanent deformation to the end stops. The volume control
shall withstand a force of three (3) inch-pounds in each direction without permanent
deformation to the end stops.
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