Product Overview
Amphenol UG-932/U MHV Straight Male Plug - 5000V Peak, 50 Ohm, Bayonet Coupling, RG-58 Compatible
Condition
Unused NOS. Still sealed in original packaging. Sourced from a government research facility. Nickel-plated brass body with knurled coupling ring and extended white dielectric insulator nose intact; lug washer present; stamped barrel codes legible; minor surface scratches on coupling hardware; MADE IN USA label present with handwritten tracking code on wrap.
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Product Overview
Amphenol UG-932/U is a Miniature High Voltage (MHV) straight male cable plug for coaxial RF connections up to 5,000V peak operational voltage. Bayonet-style coupling mechanism - physically similar to BNC but not intermateable with BNC jacks by design, keeping high-voltage contacts isolated from standard-voltage equipment. Nickel-plated brass body, beryllium copper center pin, PTFE-extended dielectric insulator that protrudes past the outer contact ring to prevent accidental shock on live circuits. Compatible with RG-58, RG-58A, RG-58C, RG-141, and equivalent outer-diameter flexible coax. MADE IN USA. Amphenol legacy CAGE code 74868 stamped on barrel.
Key Features
- Connector type: MHV (Miniature High Voltage), straight male plug
- Voltage rating: 5,000V peak operational; 3,000V RMS working
- Impedance: 50 Ohm
- Coupling: Bayonet-style locking collar
- Body: Nickel-plated brass with knurled coupling ring
- Center contact: Beryllium copper male pin
- Dielectric insulator extends past outer contact ring - prevents accidental contact with live center pin
- Cable compatibility: RG-58, RG-58A, RG-58C, RG-141, and same outer-diameter flexible RF coax
- Not intermateable with BNC connectors - by design, for safety
- MADE IN USA; Amphenol CAGE 74868
Applications
- Assembling or repairing high-voltage cable assemblies for Geiger counters, scintillation probes, and nuclear detection equipment - terminating RG-58 to a fresh plug before routing signal to the detector head
- Connecting high-voltage power supplies to X-ray equipment or lab test benches where standard BNC connectors would be unsafe at the operating voltage
- Replacing a damaged MHV plug on industrial imaging or legacy military instrumentation to restore safe, standardized interconnect without requalifying the cable assembly
- Building custom high-voltage transmission lines for university physics experiments or R&D benches that run above BNC's safe ceiling
- Makers and hobbyists constructing plasma experiments, Tesla coil controllers, or high-voltage pulse generators who need a keyed, locking connector that physically prevents accidental mating with low-voltage gear
Frequently Asked Questions
Will this mate with a standard BNC jack?
No. The MHV connector is intentionally not intermateable with BNC jacks. The two connector families share a similar silhouette but MHV's extended dielectric insulator changes the geometry enough to prevent mating. This is a deliberate safety feature - attempting to force the connection risks damage and defeats the high-voltage isolation the design provides.
What cables does this terminate?
The UG-932/U is designed for RG-58, RG-58A, RG-58C, and RG-141, as well as other flexible coax cables with the same outer diameter. Termination is by clamp or solder method.
Is this the same as the UG-932A/U?
No. The UG-932A/U (Amphenol 000-27975) is a related MHV straight clamp plug but is a distinct part. This listing is for the UG-932/U (Amphenol 000-28000) only.
What is the frequency range?
MHV connectors are suited for DC to approximately 300 MHz. They are optimized for high-voltage transmission rather than strictly controlled RF impedance at high frequencies.
Is there any safety consideration I should know before using MHV connectors?
Yes. The MHV center pin is accessible when unmated, and the ground breaks before the signal during disconnection. Always de-energize the circuit before mating or unmating the connector. If your application requires safer sequencing, SHV (Safe High Voltage) connectors address that limitation.
A government lab kept this connector unused and sealed for decades - the kind of sourcing that makes NOS actually mean something. Terminate it to your RG-58 and put 5,000 volts exactly where it belongs.
