MIL-PRF-27/172E
TABLE I. Electrical ratings. 1/ 2/ - Continued.
Primary
Secondary 3/
Primary
Primary
Secondary
Power level
impedance
impedance
dc current
dc
dc
Dash
Circuit
at 1 kHz
resistance
resistance
no.
diagram
(max)
(ohms)
(ohms)
(mA) 4/
±25%
±25%
(mW)
(ohms)
(ohms)
40,000 CT
(Brn-Blu)
4,000 CT
(Yel-Grn)
0.25
50
1,700
450
42
E
50,000 CT
5,000 CT
0.25
43
B
200,00
(Blk-Grn)
1,000
(Blu-Red)
0
25
9,000
100
44
F
200,000 CT
(Yel-Grn)
1,000 CT
(Brn-Blu)
0
25
9,000
100
45
E
600 CT
(Brn-Blu)
600 CT
(Yel-Grn)
4
600
47
47
46
4,000 CT
(Brn-Blu)
8,000 CT
(Yel-Grn)
2
100
320
590
5/
H
5,000 CT
10,000 CT
2
47
8,000 CT
(Brn-Blu)
1,200 CT
(Yel-Grn)
1
100
640
110
5/
H
10,000 CT
1,500 CT
1
48
9,000 CT
(Brn-Blu)
9,000 CT
(Yel-Grn)
1
100
850
1,080
5/
H
10,000 CT
10,000 CT
1
49
100,000 CT
(Yel-Grn)
500 CT
(Brn-Blu)
0
25
7,900
85
5/
I
50
200,000 CT
(Yel-Grn)
1,000 CT
(Brn-Blu)
0
25
10,700
100
5/
I
1/ Qualification testing and approval to M27/172-49 or M27/172-44 shall be sufficient to grant qualification
approval to M27/172-01 through M27/172-50.
2/ Impedance values written one above the other indicates a range of matching impedances over which the
parts will give satisfactory performance as long as the impedance ratio is maintained.
3/ Where windings are listed as SPLIT, one-fourth of the listed impedance is available by paralleling the
winding.
4/ Primary dc current shall be the maximum single-ended current for which the transformer will meet the
specified performance requirements. For push-pull, mA dc can be any balanced value taken by .5 W
transistors.
5/ Includes electrostatic shield. Shield terminal shall be white. Voltage ratio shall be 2 to 1 at 20 kHz.
5
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