Looking to install a clamp-style RF connector? These connectors offer durability, reusability, and solid RF performance for amateur radio, CB, and test setups. This general guide walks you through the general way to prepare, assemble, and test your coaxial cable using a clamp-style connector.
🛠️ What Is a Clamp-Type Connector?
Clamp-style RF connectors use:
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A soldered center pin (for the inner conductor)
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A metal clamp sleeve (to grip the braided shield)
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A body and backshell (to mechanically secure the assembly)
Common with:
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UHF Series
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N-type)
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BNC
✅ Reusable
✅ No crimp tools required
✅ Great for field repairs and homebrew setups
📦 What You’ll Need
Tools:
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Soldering iron (30–60W)
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Rosin-core solder (fine or medium gauge)
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Wire cutters & needle-nose pliers
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Coax stripper or sharp utility knife
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Small screwdriver or wrench
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Heat shrink tubing (optional)
Materials:
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Clamp-style RF connector
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Coaxial cable (RG-8, RG-58, RG-213, etc.)
📋 Step-by-Step Instructions
🔹 Step 1: Prepare the Cable
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Cut the cable square and clean.
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Strip the coax using a coax stripper or knife. Follow the details on our cutting chart for lengths.
📏 For connector coax cutting dimensions, consult our reference:
➡️ W5SWL Coax Cutting Chart
🔹 Step 2: Tin the Center Conductor
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Lightly tin the center conductor with solder to strengthen it and prepare it for the pin. If desired, but handy if the center pin does not have a side solder hole.
🔥 Don’t let solder run down into the dielectric—this causes SWR and impedance problems.
🔹 Step 3: Assemble the Clamp Hardware
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Slide the backshell and clamp sleeve over the cable (in that order).
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Insert the center conductor into the pin and solder it.
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Gently press the braid down around the outer jacket.
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Push the cable into the main connector body, ensuring the center pin seats properly.
🔹 Step 4: Clamp the Braid
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Slide the clamp sleeve forward over the braid inside the connector.
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Tighten the compression nut or backshell (depends on connector type).
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You should feel slight resistance—this means the braid is captured.
⚙️ Some designs use a clamp ring that must be tightened with a small wrench or screwdriver.
🔹 Step 5: Inspect and Seal
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Confirm no stray braid wires touch the center pin.
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Apply heat shrink tubing or electrical tape for strain relief if desired.
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Tighten all threaded connections securely.
✅ Quality Control Check
Before using the cable:
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Multimeter Tests:
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Center pin to center pin (end to end): ✅ continuity
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Shield to shield (end to end): ✅ continuity
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Center to shield: ❌ no continuity
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SWR Check or use an Ohm meter.
🤔 FAQs
Q: Are clamp connectors better than crimp?
A: They are serviceable and often easier to assemble without crimp tools. Crimp connectors may perform better at very high frequencies. Clamp connectors are a learning experience!
Q: Can I re-use a clamp connector?
A: Yes, some times if it hasn’t been overheated or mechanically damaged and the RF pin is not captive.
Q: What cable types are supported?
A: Most standard cables like RG-58, RG-8X, RG-213, and LMR-400 can be used—just ensure the connector matches the cable diameter.
Know how to put on a Clamp Connector? Teach others!