Product Overview
Microtech AR-50-4 Subminiature Coaxial Feedthrough Receptacle - Gold-Plated, Panel Mount, Unused NOS
Condition
Unused NOS. Evaluation: Visual inspection only. Function testing not performed. Gold-plated threaded body, red dielectric collar, ring terminal lug, and matching gold-plated ring nut present. Markings legible on label: part no. AR-50-4, qty 1. Sourced from a government research facility.
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Product Overview
Microtech, Inc. AR-50-4 subminiature coaxial bulkhead feedthrough receptacle connector. Manufactured by Microtech of Folcroft, Pennsylvania, a producer of subminiature and microminiature coaxial connectors for precision RF and instrumentation applications. This connector is designed to pass RF signals through a panel, bulkhead, or shielded enclosure wall while maintaining electrical isolation from the chassis. The rear ring terminal lug accepts a solder termination; the threaded body mounts through a panel cutout and is secured by the included ring nut.
Key Features
- Subminiature coaxial bulkhead feedthrough receptacle design
- Gold-plated threaded body with coarse external threads
- Red dielectric collar and insulating flange visible on body
- Gray dielectric insert at mating face
- Rear ring terminal lug for solder wire termination
- Matching gold-plated ring nut included for panel mounting
- Microtech AR-50-4 part number confirmed on label
- Incompatible with standard BNC, Type N, or SMA connectors without adapters
Applications
- Mounting an RF signal feedthrough in a shielded instrumentation enclosure or test chassis
- Replacing a failed bulkhead receptacle in vintage Microtech-equipped RF test equipment during restoration
- Building or repairing panel-mount coaxial feed points in custom shielded enclosures for RF experimentation
- Vintage test equipment restoration where the original subminiature coaxial hardware must be retained for signal integrity
Frequently Asked Questions
What panel cutout or thread size does this connector require?
The exact thread pitch and outer body diameter are not confirmed in available documentation. Measure the threaded body diameter directly before drilling or cutting a panel. The physical connector is available for measurement prior to installation.
What is the impedance of the AR-50-4?
Impedance is not confirmed for this specific part number. Subminiature coaxial connectors from this era were commonly designed for 50-ohm RF systems, but that value is not verified for the AR-50-4. Buyers should determine impedance requirements for their application independently.
What mating plug does this receptacle accept?
The AR-50-4 requires a compatible Microtech subminiature coaxial male plug. The specific mating series designation is not confirmed. Standard SMA, SSMA, BNC, or Type N plugs are not compatible without adapters. Verify the mating connector type against your existing hardware before ordering.
Is the ring nut included?
Yes. The matching gold-plated ring nut is included with the connector as shown in the product photos.
Is this a current production part?
No. Microtech, Inc. of Folcroft, Pennsylvania was a vintage manufacturer. This is new old stock from government surplus. Original factory documentation for this line is not widely available through current commercial channels.
Vintage subminiature RF hardware from a government facility - unused, labeled, and ready to go back to work in a shielded enclosure or a careful restoration bench. The ring nut is still there. That part is harder to replace than you think.
