Part Details | VARIABLE ATTENUATOR
5985-00-245-2656 A device for reducing the strength of an alternating current signal either continuously or in steps, without causing appreciable signal distortion, by maintaining substantially constant output and/or input impedance match. Continuously variable resistive devices must consist of at least two sections or one section with at least two rotating contacts. The item must have an overall attenuation rating. Includes tandem mounted variable resistors designed to function as an attenuator but whose terminals are not connected. See also RESISTOR, VAIABLE (as modified).
Alternate Parts: X11032, X1103-2, 2661998, 5985-00-245-2656, 00-245-2656, 5985002452656, 002452656
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 59 | JUL 09, 1969 | 00-245-2656 | 00838 ( ATTENUATOR, VARIABLE ) |
REFERENCE DRAWINGS & PICTURES
WAVEGUIDE TYPE
Cross Reference | NSN 5985-00-245-2656
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| X1103-2 | 11787 | MCS CORPORATION MICROWAVE COMPONENTSDIV |
| 2661998 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
Technical Data | NSN 5985-00-245-2656
| Characteristic | Specifications |
|---|---|
| APPLICATION DESIGN | WAVEGUIDE |
| FREQUENCY RANGE | 8.200 GIGAHERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM |
| VOLTAGE STANDING WAVE RATIO | 1.15 |
| INSERTION LOSS AT MINIMUM ATTENUATION IN MAXIMUM DECIBELS | 0.5 |
| OVERALL ATTENUATION RANGE IN DECIBELS | P0.0/P20.0 |
| ATTENUATION VARIATION METHOD | CONTINUOUS |
| BODY STYLE | WAVEGUIDE TYPE |
| OVERALL LENGTH | 2.250 INCHES NOMINAL |
| OVERALL HEIGHT | 2.812 INCHES NOMINAL |
| OVERALL WIDTH | 1.625 INCHES NOMINAL |
| ADJUSTMENT DEVICE TYPE AND QUANTITY | 1 SHAFT |
| SHAFT TYPE | ROUND |
| SHAFT DIAMETER | 0.1870 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM |
| SHAFT LENGTH | 0.220 INCHES NOMINAL |
| TERMINAL TYPE AND QUANTITY | 2 FLANGE |
| WAVEGUIDE FLANGE DESIGNATION | UG-39/U |
| MOUNTING FACILITY TYPE AND QUANTITY | 4 TERMINAL W/MOUNTING HOLES |
| MOUNTING FACILITY PATTERN | FOUR POSITION RECTANGULAR |
| UNTHREADED MOUNTING HOLE DIAMETER | 0.166 INCHES MINIMUM AND 0.172 INCHES MAXIMUM |
| CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH | 1.276 INCHES MINIMUM AND 1.284 INCHES MAXIMUM |
| CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH | 1.216 INCHES MINIMUM AND 1.224 INCHES MAXIMUM |
| OPERATING TEMP RANGE | -40.0 TO +85.0 DEG CELSIUS |
| WAVEGUIDE FLANGE TYPE | CONTACT |