ARC-182\(V\) radio set. The antenna is an aircraft fuselage mounted blade enclosed element. The antenna is a broadband, fix tuned, exhibits omnidirectional radiation pattern, and is vertically polarized for radiating and receiving radio waves in the 30-88 MHz, 108-174 MHz, and 225-400 MHz communication bands.

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MIL-DTL-85670D

2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the

text of this document and the references cited herein, the text of this document takes precedence. Nothing in this

document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3. REQUIREMENTS

3.1 Qualification. Antennas furnished under this specification shall be products which have passed the

qualification tests and are approved for listing on the qualified products list (QPL) at the time set for opening of bids.

3.2 Qualification inspection/testing. In order to be listed on the qualified products list, three samples shall have

complied with the qualification inspection/testing (see 4.4 and 6.3). Testing must be authorized by and conducted

under the review of the qualifying activity (DLA Land and Maritime, Code VQE, P.O. Box 3990, Columbus, OH

43218-3990 (mail to: vqe.chief@dla.mil).

3.3 Parts and materials. Parts and materials shall be in accordance with best manufacturing practices for class 1

equipment designed for 15.20 km (50,000 feet) altitude and continuous sea level operation over the temperature

range of -54�C to +55�C (+71�C intermittent operation) and as specified herein.

3.3.1 Nonstandard part approvals. Approval for the use of nonstandard parts shall be obtained from the qualifying

activity. Approval of all nonstandard parts shall be completed before qualification approval can be granted.

3.3.2 Parts reliability assurance. When available, all electrical and electronic parts shall be military approved,

established reliability parts. All non-established reliability parts shall be subjected to a 100 percent screening test in

accordance with the procedures of 4.7, prepared in accordance with MIL-T-18303.

3.3.3 Parts derating and applications. All parts used shall be applied well within the ratings. The derating shall

encompass the appropriate and meaningful application conditions such as voltage, current, power, temperature,

mechanical, and duty cycle. Electronic parts shall conform to table I electronic parts derating for worst case electrical

and environmental stress unless formal written approval is received from the acquiring activity prior to incorporating

into the design. Part level stress analysis shall be used to verify that all parameter stresses are within the derated

values at worst case circuit and environmental conditions. The limitations on parts usage shall be in accordance with

table I.

TABLE I. Part derating requirements.

Part type

Parameter maximum

Maximum allowable

stress

Capacitors

Voltage

50 percent of rating

Resistors

Power

50 percent of rating

Voltage

70 percent of rating

Transformer/inductive

Winding temperature

30 percent below

devices 1/

rated temperature

Current

70 percent of rating

1/ Coils wound by the antenna manufacturers shall be considered

assemblies, not parts.

3.3.4 Sealing materials (electrical). The antenna shall be encapsulated. The use of encapsulated materials for the

purpose of sealing, supporting, attaching, or protecting electronic components shall conform to the following

requirements, and shall be in strict conformance to sealant manufacturer's instructions.

Encapsulating and potting materials shall be hydrolytically stable. (MIL-HDBK-454, guideline 47 may be

used for guidance).