Vintage Belden 8424 5-Pin XLR Male to Amphenol 7-Pin Specialty Pro Audio Cable - 40+ Feet
For sale is the vintage specialty interconnect cable shown.
This is a substantial professional-quality cable measuring at least 40 feet long. It was measured conservatively by counting and measuring the coiled loops rather than completely unwinding it. It appears likely to be closer to 50 feet, but it is being advertised as 40+ feet so the buyer can rely on the stated minimum.
BELDEN 8424 CABLE:
The cable jacket is marked BELDEN 8424.
Belden 8424 is a professional shielded microphone/audio cable type used in demanding audio applications.
The Belden marking identifies the cable stock itself. The manufacturer of the complete assembled interconnect has not been identified.
CONNECTORS:
One end has a male 5-pin XLR connector.
The opposite end has a vintage Amphenol-branded male circular connector with seven contacts labeled A, B, C, D, E, F and H.
The contact arrangement is consistent with the 16S-1 seven-contact layout used in Amphenol / MIL-style circular connectors.
The exact complete Amphenol shell part number has not been confirmed, so this listing does not claim a specific 97-3106A or MS3106A part number.
VERIFIED PINOUT:
The cable was tested with an ohmmeter and its actual connector-to-connector continuity was mapped.
5-Pin XLR Male → 7-Pin Amphenol Connector
- XLR Pin 1 → Amphenol Contact F
- XLR Pin 2 → Amphenol Contact E
- XLR Pin 3 → Amphenol Contact H
- XLR Pin 4 → Amphenol Contact D
- XLR Pin 5 → Amphenol Contact C
- XLR Shield / Shell → Amphenol Shield / Shell
- Amphenol Contact A → Not connected
- Amphenol Contact B → Not connected
No shorts were detected during testing.
The measured pinout above is being provided exactly as tested. No assumption is being made about the internal use of the individual conductors beyond the Belden 8424 jacket marking and the measured continuity results.
WHAT IS THIS / WHY WOULD SOMEONE WANT IT?
This is not an ordinary modern microphone lead.
The combination of genuine Belden 8424 professional audio cable, a male 5-pin XLR connector, vintage Amphenol multi-contact circular hardware and substantial 40+ foot length strongly suggests a specialized professional-audio or related electronic-equipment application.
Potential uses include:
- Vintage tube microphone / power-supply restoration
- Vintage microphone-system restoration
- Studio equipment restoration
- Broadcast equipment restoration
- Professional audio equipment
- Custom microphone or PSU projects
- Specialized vintage electronics interconnects
- Laboratory or test-equipment projects
- Replacement for a missing proprietary cable
- Donor source for vintage Amphenol connector hardware
- Projects requiring this exact documented connector and pinout configuration
The exact microphone, power supply or equipment system this cable originally served has not been identified. Compatibility with any specific microphone manufacturer or model is therefore not claimed.
WHY THIS CABLE IS USEFUL:
Older professional equipment frequently used specialized multi-pin interconnects that can be difficult and expensive to reproduce today.
This cable provides:
- Genuine Belden 8424 cable stock
- Vintage Amphenol-branded 7-contact connector hardware
- Male 5-pin XLR connector
- At least 40 feet of cable
- Completely documented connector-to-connector pinout
- Separate shield/shell continuity
- Continuity and short testing already performed
For a technician or restorer who needs this particular configuration, knowing the exact measured wiring before purchase can save substantial time compared with sourcing vintage connectors and building or tracing a replacement from scratch.
CONDITION:
The cable remains flexible and the exterior insulation appears in good used condition.
The connectors are also in good used condition with normal cosmetic wear consistent with vintage age and use.
TESTING:
Testing was performed with an ohmmeter for continuity and shorts.
The cable was not tested connected to a microphone, microphone power supply or other powered equipment and has not been tested for audio performance under operating conditions.
No voltage or current suitability is represented.
IMPORTANT COMPATIBILITY INFORMATION:
Vintage professional equipment frequently used proprietary wiring arrangements even when the physical connectors appeared identical.
Please compare the connector configuration and exact documented pinout above with your equipment before connecting or applying power.
BELDEN refers to the marked cable stock. AMPHENOL refers to the branded 7-pin connector component. The manufacturer of the complete assembled cable has not been identified.
Includes the single cable shown.