MIL-DTL-18266C
4.6.9 Ambient temperature cycling (see 3.5.5). Ambient temperature cycling shall consist of varying
the ambient temperature surrounding the cord under test as follows:
a. Reduce the ambient temperature from normal room temperature to 62 degrees C, as rapidly as
practicable.
b. Retain the ambient temperature at - 62 degrees C for 30 minutes.
c. Increase the ambient temperature to + 85 degrees C, as rapidly as practicable.
d. Retain the ambient temperature at + 85 degrees C for 30 minutes.
e. Reduce the ambient temperature to normal room temperature, as rapidly as practicable.
f. Retain the ambient temperature at normal room temperature for 10 minutes.
g. Repeat the procedures set forth in (a) to (f) above inclusive, until the cord has been subjected to 5
complete cycles.
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h. Upon completion of the 5 and last set of temperature cycles, retain the ambient temperature at
normal room temperature for one hour, and then measure the frequency response as specified in
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD personnel,
these personnel need to contact the responsible packaging activity to ascertain requisite packaging
requirements. Packaging requirements are maintained by the Inventory Control Point's packaging activity
within the Military Department or Defense Agency, or within the Military Department's System Command.
Packaging data retrieval is available from the managing Military Department's or Defense Agency's
automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful but is not
mandatory.)
6.1 Intended use. The cord covered by this specification is designed to provide electrical
connections between earphone H-87B/U, as specified in MIL-DTL-18239 and inter-communication and/or
radio facilities.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification.
b. Packaging requirements (see 5.1)
6.2.1 Contract data requirements. Data specified in paragraph 4.3 will be listed directly on a
DD Form 1423 and incorporated into the contract.
6.3 Definitions.
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