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MIL-PRF-19 Resistor, Variable, Wirewound \(Low Operating Temperature\), General Specification ForThis specification covers the general requirements for variable resistors having a resistance element of wirewound on an insulating strip shaped in an arc, so that a contract bears uniformly on the resistance element when adjusted by a control shaft. These resistors are capable of full load operation at an ambient temperature of +40 degrees C and are capable of continuous operation when properly derated, at a maximum temperature of +105 degrees C.

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MIL-PRF-19E
APPENDIX A
A.4 EXTENT OF QUALIFICATIONS
A.4.1 Single type submission. Qualification as shown in the type submitted.
A.4.2 Combined type submission. Qualification within a style and characteristic will be shown in table A-III.
Qualification of resistors with standard (N) type bushings will qualify resistors with sealed (S) type bushings.
Conversely, qualification of resistors with sealed (S) type bushing will qualify resistors with standard (N) type bushing.
Qualification of resistors with locking (L) type bushing will qualify resistors with sealed (T) type bushings. Conversely,
qualification resistors with sealed (T) type bushings shall qualify resistors with locking (L) type bushings.
TABLE A-III. Extent of qualification.
Lot
Qualification coverage
All resistance values between the highest value and all lower values
1
for which qualification is sought; taper A, without switches.
All resistance values between the highest value and all lower values
2
for which qualification is sought; taper C, without switches.
All resistance values between the highest value and all lower values
3
for which qualification is sought; all tapers, without switches.
All resistance values between the highest value and all lower values
4
for which qualification is sought, taper A, with or without switches.
All resistance values between the highest value and all lower values
5 1/
for which qualification is sought, taper C, with or without switches.
All resistance values between the highest value and all lower values
6 1/
for which qualification is sought, all tapers, with or without switches.
1/
In the event of switch failure only, qualification will be granted as stated, except for
switches.
Custodians:
Preparing activity:
Army - CR
DLA - CC
Navy - EC
Air Force - 11
DLA - CC
Review activities:
(Project 5905-2007-070)
Army - AR, AT, AV, CR4, MI
Navy - AS, CG, MC, OS
Air Force - 99
NOTE: The activities listed above were interested in this document as of the date of the 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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