MIL-DTL-23971/1B
REQUIREMENTS:
Design and construction: See figures 1, 2, and 3.
Terminals: Solder tabs.
Material and finish of terminals:
Part numbers 01, 03, and 04 - Nickel with electrodeposited tin coating 0.0001 to 0.0005 inch thick per
ASTM-B545 "Standard Specification for Electrodeposited Coatings of Tin" or Iron-nickel alloy in accordance
with SAE-AMS-I-23011 "Iron-Nickel Alloys for Sealing to Glasses and Ceramics", Class I (KOVAR), gold
plated in accordance with MIL-DTL-45204 "Gold Plating, Electrodeposited ", or SAE-AMS-2422 "Plating, Gold"
and/or, ASTM-B488 "Electrodeposited Coating of Gold for Engineering Uses" ; type I, grade C. Nickel is to be
used only if specification cannot be met using alternate material means.
Part number 02 - Kovar, gold plated in accordance with MIL-DTL-45204, or SAE-AMS-2422 and/or, ASTM-
B488, type II, class I, grade C.
Ambient temperature:
Operating - -54° to +110°C.
Storage - -62° to +125°C.
Electrical performance characteristics: See table I.
TABLE I. Electrical performance characteristics.
M23971
Impedance
Frequency
Average
vswr
Insertion
Isolation
Phase
Amplitude
Power
Figure
level
/1-
(ohms)
range
coupling
max
loss
min
balance
balance
90°
(MHz)
max
(dB)
(dB)
(dB)
avg
pk
(dB)
(W) (W)
±1.5
01
50
225-400
3 +.2, -0
1.2:1
0.3
23
0.4
60
300
1
±1.5
02
50
250-500
3 +.2, -0
1.2:1
0.25
23
0.5
60
300
1
±1.5
03
50
225-400
3 +.2, -0
1.2:1
0.25
25
0.4
100 200
2
04
3
Part number: M23971/1- (and dash number from table I).
Referenced documents: In addition to MIL-DTL-23971, this document references the following
MIL-DTL-45204
ASTM-B488
ASTM-B545
SAE-AMS2422
SAE-AMS-I-23011
The margins of this specification sheet are marked with vertical lines to indicate where changes from the previous
revision were made. This was done as a convenience only and the Government assumes no liability whatsoever for
any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this
document based on the entire content irrespective of the marginal notations and relationship to the last previous
issue.
Custodians:
Preparing activity:
Army - CR
DLA - CC
Navy - EC
Air Force - 85
(Project 5985-2012-010)
DLA - CC
Review activities:
Navy - AS, MC, OS
NOTE: The activities listed above were interested in this document as of the date of this document. Since
organizations and responsibilities can change, you should verify the currency of the information above using the
ASSIST Online database at https://assist.daps.dla.mil.
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