MIL-PRF-14409E
8 January 2002
SUPERSEDING
MIL-PRF-14409D
15 April 1975
PERFORMANCE SPECIFICATION
CAPACITORS, VARIABLE (PISTON TYPE, TUBULAR TRIMMER)
GENERAL SPECIFICATION FOR
This specification is approved for use by all Depart-
ments and Agencies of the Department of Defense.
1. SCOPE
1.1 Scope
. This specification covers the general requirements for tubular-trimmer, piston-type, variable
capacitors intended primarily for use in high-frequency trimming applications where relatively few adjustments are
required during the effective life of the equipment.
1.2 Classification
.
1.2.1 Type designation
. The type designation should be in the following form, and as specified (see 3.1 and
6.1):
PC51
H 380
Style Characteristic Capacitance
(1.2.1.1) (1.2.1.2) (1.2.1.3)
1.2.1.1 Style. The style is identified by the two-letter symbol "PC" followed by a two-digit number; the letters
identify tubular-trimmer, piston-type, variable capacitors, and the number identifies the shape or differentiating
electrical characteristics of the capacitor.
1.2.1.2 Characteristic. The characteristic is identified by a single letter in accordance with table I.
1.2.1.3 Capacitance. The nominal maximum rated capacitance value expressed in picofarads (pF) is identified
by a three-digit number; the first two digits represent significant figures and the last digit specifies the number of
zeros to follow. When fractional values are required, the letter "R" should be used to indicate the decimal point. For
example: 8R5 indicates 8.5 pF.
Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in
improving this document should be addressed to: (ex. Defense Supply Center, Columbus, ATTN: DSCC/VAT,
Post Office Box 3990, Columbus, OH 43216-5000), by using the Standardization Document Improvement
Proposal (DD Form 1426) appearing at the end of this document or by letter.
AMSC N/A FSC 5910
DISTRIBUTION STATEMENT A
. Approved for public release; distribution is unlimited.
INCH-POUND
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