MIL-PRF-32517
4.6.11 Flammability. The splices shall be suspended horizontally in a draft-free
enclosure above a Bunsen burner. The tip of a 1 inch natural gas flame with an inner core 1/3 its
height shall be applied to the end of the sealing sleeve for a period of 20 seconds. The Bunsen
burner shall have a ¼-inch inlet, a nominal bore of 3/8 inch, and a length of approximately 4
inches above the primary inlets. Self-extinguishing above 5 seconds due to the MIL-DTL-17
cable is not considered to be a failure (see 3.4.14).
4.6.12 Copper mirror corrosion. For sizes 0.300 inch and larger (as supplied I.D.) the
termination shall be cut longitudinally into 4 sections. For sizes smaller than 0.300, the whole
terminations shall be used. The termination or all pieces of cut terminations shall be placed in a
clean, dry ½ by 12 inch test tube. A copper glass mirror about ¼ by 1 inch and a calibrated
thermometer shall be suspended 6 to 7 inches above the bottom of the test tube by means of a
fine, clean copper wire attached to a cork that has been wrapped in clean aluminum foil. A
second clean test tube containing only the mirror and thermometer shall be used as a control.
The lower 2 inches of the test tube shall be immersed in an oil bath at 121 ±3 °C for 16 ±0.5
hours. The temperature of that portion of the test tube containing the copper mirror shall be
below 60 °C. After removal from the oil bath and cooling to ambient temperature (see 4.2),
visually examine the mirror for areas of transparency by placing it on a white background in
good light. The mirrors shall be vacuum deposited copper with a thickness equal to 10 ±5
percent transmission of normal light of 5000 Angstroms. They shall be stored in a vacuum and
shall be used only if no oxide film is present and the copper is not visibly damaged or
contaminated (see 3.4.15).
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When packaging of materiel is to be performed by
DoD or in-house contractor personnel, these personnel need to contact the responsible packaging
activity to ascertain packaging requirements. Packaging requirements are maintained by the
Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. 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 which may be helpful,
but is not mandatory.)
6.1 Intended use. Matched impedance splices covered by this specification are for use in
making environmentally protected permanent joints on MIL-DTL-17 coaxial cables. The
matched impedance splice is military unique because it is required to match the impedance of
MIL-DTL-17 coaxial cables to reduce insertion loss and maintain signal integrity. In addition,
the matched impedance splice must work in the military aircraft operating environment, which
requires environment resistance and the ability to operate in a high electromagnetic interference,
high shock, high vibration, high and low temperature and high corrosion environment. A
commercial substitute is not available.
21
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business