The Mixer Stage,frequency, cataloged under National Stock Number 5895-00-239-9138, is classified within Federal Supply Class 5895 (Miscellaneous Communication Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Semic Rf Electronic Gmbh. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5895-00-239-9138 |
| Primary Part Number | MD643 |
| Item Name | Mixer Stage,frequency |
| FSC / FSG | 5895 / 58 — Miscellaneous Communication Equipment |
| Manufacturer | Semic Rf Electronic Gmbh |
| Status | ACTIVE |
| Circuit Construction Type | SOLID STATE |
| FSC Application Data | SYNCHRONIZER-EXCITER,RADAR SET,AIRBORNE |
| Impedance Rating Per Channel | 50.000 OHMS 2ND INPUT CHANNEL |
| Impedance Rating Per Channel | 50.000 OHMS OUTPUT CHANNEL |
| Impedance Rating Per Channel | 50.000 OHMS 1ST INPUT CHANNEL |
| Inclosure Type | ENCASED |
| Overall Diameter | 0.380 INCHES NOMINAL IN |
| Frequency Per Channel | 500.0 MEGAHERTZ MAXIMUM OUTPUT CHANNEL |
| Frequency Per Channel | 0.0 MEGAHERTZ MINIMUM 2ND INPUT CHANNEL |
| Frequency Per Channel | 2.0 MEGAHERTZ MINIMUM 1ST INPUT CHANNEL |
| Frequency Per Channel | 2.0 MEGAHERTZ MINIMUM OUTPUT CHANNEL |
| Frequency Per Channel | 500.0 MEGAHERTZ MAXIMUM 1ST INPUT CHANNEL |
| Frequency Per Channel | 500.0 MEGAHERTZ MAXIMUM 2ND INPUT CHANNEL |
| Connection Type | COAXIAL RECEPTACLE BOTTOM |
| Connection Contact Type and Quantity | 4 PRINTED CIRCUIT EXTERNAL |
| Basic Shape Style | CYLINDRICAL |
| Average Life Measurement | NOT RATED |
| Operating Temp Range | -55.0 TO 100.0 CELSIUS DEGC |
| Installation Design | MODULE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | J |
| Weight | 0.0200 lbs |
| Cube | 0.0020 cu ft |
| Part Number | Manufacturer |
|---|---|
| MD643 | Semic Rf Electronic Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| MD643 | 3/9 Design control — primary reference U.S. Government activity |
| 539303-1 | 7/2 Vendor item drawing reference U.S. Government activity |
| 642AS2720 | C/1 Advisory reference — outside the item-of-supply concept Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 5895-00-239-9138 is a Mixer Stage,frequency, manufactured by Semic Rf Electronic Gmbh, classified under FSC 5895, Miscellaneous Communication Equipment. Status: active.
NSN 5895-00-239-9138 has 1 manufacturer part number on file: MD643 (Semic Rf Electronic Gmbh).
Key specifications for MD643: Circuit Construction Type: SOLID STATE; FSC Application Data: SYNCHRONIZER-EXCITER,RADAR SET,AIRBORNE; Impedance Rating Per Channel: 50.000 OHMS 2ND INPUT CHANNEL; Impedance Rating Per Channel: 50.000 OHMS OUTPUT CHANNEL. 19 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5895-00-239-9138 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.