RAM Mount Ham Radio, CB Radio, and Scanner Guide: How to Build a Vehicle Setup

Building a RAM mount ham radio setup solves the biggest headache in mobile communications: unlike smartphones or consumer GPS navigators, amateur transceivers, GMRS units, CB radios, and police scanners do not share a single standardized body shape. A handheld dual-band HT with an extended lithium battery pack, a detachable Yaesu or Icom remote control head, and a four-pound mobile transceiver chassis all demand completely different brackets, fasteners, and vibration tolerances. Because RAM Mounts separates the vehicle base, the socket arm, and the device adapter into interchangeable 1-inch (B-size) and 1.5-inch (C-size) ball components, you can build a rigid, rattle-free mounting rig tailored to your exact radio and cabin layout.

This guide covers how the modular RAM Mounts system works for handheld HTs, detachable remote control heads, CB hand mics, and full-body mobile radios, including which ball size your transceiver requires and which adapter plates connect radio brackets to a RAM socket arm.

Best RAM Mount Ham Radio Holders, Bases, and Adapters Compared

Before ordering individual parts, distinguish complete base-and-arm assemblies from standalone device cradles. In the RAM catalog, universal radio cradles like the Finger-Grip ship as a bare holder with a two-hole AMPS backplate, meaning you must bolt a 1-inch diamond ball adapter to the back before clamping it into a socket arm.

Why RAM Mounts Work So Well for HAM, CB, and GMRS Radios

Consumer phone mounts fail with two-way radio gear because they are engineered around thin, flat rectangles weighing six to eight ounces. Amateur and commercial radio hardware spans everything from thick, brick-shaped handheld transceivers (HTs) with protruding SMA antenna connectors and side Push-To-Talk (PTT) paddles to remote control heads tethered by six-pin modular separation cables.

RAM Mounts solves that compatibility gap by splitting the mount into three independent mechanical stages:

• The Vehicle Base: Anchors to your seat rail bolt, dashboard panel, windshield glass, or tubular handlebar and provides the lower elastomeric rubber ball.
• The Double Socket Arm: Clamps over the lower base ball at one end and the upper radio ball at the other, locking both joints simultaneously with a single center thumb knob.
• The Radio Holder or AMPS Plate: Grips the handheld radio body, captures the belt clip, or bolts directly to the factory mounting bracket on a detachable control head.

Because the 1-inch rubber ball absorbs high-frequency road shock and allows infinite 360-degree tilt and swivel adjustment, you can angle a directional radio speaker or color waterfall display straight toward the driver’s seat without fabrications or custom dash brackets. If you are putting together your first three-piece rig from individual parts, see our step-by-step RAM Mount assembly and parts guide for fastener sizes and socket-arm spring tips.

Understanding RAM Ball Sizes for Radio Setups: B Size vs. C Size

Before selecting a holder or vehicle base, match your radio’s weight and mounting style to the correct RAM ball diameter. Mixing ball sizes is impossible because a 1-inch ball will not clamp inside a 1.5-inch socket arm.

• B Size (1-Inch Ball — Rated up to 2 lbs in standard use / 1 lb in heavy vibration): The right choice for all handheld HAM and GMRS walkie-talkies (Baofeng, Yaesu, Icom, Kenwood, Anytone), handheld police scanners, speaker microphones, and all detachable mobile radio control heads. Because a separated control head (such as the face of a Yaesu FTM-400XDR, FTM-300DR, or Icom ID-5100A) houses only the screen and control knobs while the heavy cast-aluminum RF amplifier brick sits under the seat, the remote head weighs only 5 to 12 ounces. A 1-inch B-size setup holds detachable heads with zero droop.
• C Size (1.5-Inch Ball — Rated up to 4 lbs): Required whenever you are mounting a full-chassis one-piece mobile HAM radio (such as a Yaesu FT-2980R or Icom IC-V3500), a full-size metal CB transceiver (Cobra 29 LTD, Uniden Bearcat 880/980, or President McKinley), or a heavy mobile trunking scanner (Uniden Bearcat SDS200) directly by its steel U-bracket. Full-body transceivers weigh 2.5 to 5 pounds with heavy rear heatsinks and stiff coax cables pulling on the chassis, which will cause a 1-inch B-size ball to slip on rough pavement or off-road trails.

Best RAM Mount Setups for Handheld HAM Radios (HTs) and Scanners

Handheld radios fail in standard smartphone cradles for two reasons: the radio battery pack makes the chassis 1.5 to 2.25 inches thick, and solid side clamp jaws press directly against the side Push-To-Talk (PTT) transmit key, monitor buttons, and speaker-mic dust covers. Here are the two best ways to secure a handheld transceiver on a 1-inch B-size RAM arm.

1. RAM Finger-Grip Universal Radio Holder (RAM-HOL-UN4U) — Best Overall Handheld Cradle

The RAM Finger-Grip Holder (part number RAM-HOL-UN4U) is the purpose-built RAM Mount radio holder for handheld HAM transceivers, GMRS portables, and large digital trunking scanners. Instead of solid side walls that crush side controls, the high-strength composite spine (7.25 inches tall) uses pairs of flexible, rubber-coated clamping fingers that slide independently up and down vertical side tracks.

Every RAM-HOL-UN4U box includes three complete sets of four side fingers (short, medium, and long) plus an adjustable bottom support cup that expands from 1.25 inches to 3.5 inches wide. That modular finger system solves the classic HAM radio clearance problem:

• Zero Accidental PTT Key-Downs: You can position the left-hand fingers above and below the Push-To-Talk paddle on a Yaesu FT-60R, FT-5DR, VX-6R, Icom ID-52A, Anytone AT-D878UVII, or Baofeng UV-5R, and position the right-hand fingers clear of the external speaker-mic jack and DC charging barrel port.
• Fits Thick Extended Batteries and Scanners: By swapping in the longest set of fingers, the Finger-Grip wraps cleanly around extra-deep lithium battery packs and wide bodies like the Uniden Bearcat BCD436HP, SDS100, and SDS150 (which we also detail in our Uniden SDS100 and SDS150 car mounts guide).
• Open Top Clearance: The open top design gives complete clearance for top-mounted BNC and SMA whip antennas, volume/squelch concentric knobs, and channel selectors.

Crucial Assembly Note: The RAM-HOL-UN4U is sold as a cradle only with a recessed two-hole AMPS pattern on the rear spine (and includes the two #8-32 machine screws and hex nylock nuts). To connect this holder to a RAM socket arm, you must also bolt a RAM-B-238U 2-hole diamond ball base (listed below) to the back of the spine.

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2. HYSHIKRA 3-in-1 Aluminum Radio Belt Clip & Mic Holder with 1-Inch Ball — Best Replacement for the Discontinued RAM-HOL-BC1U

For years, operators who wanted to hang a handheld radio by its rear belt clip used the plastic RAM Belt Clip Holder (part number RAM-HOL-BC1U, or the bundled RAM-B-138-BC1U kit). However, RAM has discontinued the RAM-HOL-BC1U and it is no longer stocked on Amazon or major radio supply houses.

The HYSHIKRA 3-in-1 Universal Radio Belt Clip and Microphone Bracket (Model 25MMBall-Black-A) is a direct, heavy-duty upgrade designed specifically for 1-inch (25mm) RAM B-size double socket arms. Machined from black anodized aluminum alloy with a textured, non-slip rubber-coated 1-inch ball integrated directly into the rear stem, it requires no separate diamond adapter plate: you simply drop the 1-inch ball into your existing RAM B-size socket arm and tighten the wingnut.

Why radio operators prefer this 3-in-1 bracket over the old plastic RAM-HOL-BC1U:

• Holds Both Belt Clips and Round Mic Knobs: The face plate features a wide top-entry slot for standard spring-loaded HT belt clips (up to 1.41 inches / 36mm wide for Baofeng, Yaesu, Icom, Kenwood, and Midland GMRS handhelds), a center keyhole slot for round rear button studs on CB and mobile HAM hand mics, and a lower cutout slot.
• Solves the Speaker-Mic & HT Combo Problem: If you keep your handheld radio stowed in a cup holder or seat pocket and run a clipped shoulder speaker-mic, or if you run a mobile rig and want your microphone mounted right beside the control head on a dual-ball adapter, this bracket handles either job on any 1-inch RAM arm.
• All-Metal Durability: Unlike thin plastic belt-clip tongues that fatigue and snap in summer cabin heat, the CNC-machined aluminum face plate and rubber-overmolded 25mm ball hold heavy metal-chassis handhelds securely over washboard dirt roads.

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Best RAM Mount Setups for Detachable Radio Control Heads & Mobile Rigs

Most modern 50-watt VHF/UHF dual-band and HF/50MHz mobile HAM transceivers (including the Yaesu FTM-400XDR, FTM-300DR, FTM-200DR, FT-891, Icom IC-2730A, ID-5100A, IC-7100, and Kenwood TM-D710G / TM-V71A) use a detachable remote control head. You bolt the heavy RF transceiver body under a seat or in the trunk, run a thin RJ-12 or RJ-45 separation cable to the dashboard, and mount only the lightweight control face in the driver’s line of sight.

This is where RAM’s AMPS mounting pattern plates shine. Standard 4-hole AMPS plates measure 1.181 inches by 1.496 inches (30mm x 38mm), while 2-hole diamond AMPS plates space their screws 1.912 inches apart along the diagonal. Most aftermarket remote-head brackets (such as Lido, Yaesu SMB-201 adapters, and Icom MBA-4/MBA-5 magnetic or bracket plates) are pre-punched to bolt directly onto a RAM 2-hole diamond or 4-hole round AMPS ball plate using #8-32 machine screws.

3. RAM No-Drill Seat Bolt Mount (RAM-B-316-1U / Pod I Series) — Best No-Drill Vehicle Setup

If you drive a modern pickup truck, SUV, or sedan where the dashboard is packed with a 12-inch touchscreen and curtain airbags, the RAM POD I Universal No-Drill Vehicle Base (RAM-B-316-1U / RAM-B-316-1-202U) is the cleanest way to mount a detachable HAM control head or handheld cradle without drilling a single hole in your interior trim.

How the RAM Seat Bolt system works in a vehicle cab:

• Zero-Drill Passenger Seat Track Anchor: You loosen the front-left bolt on the passenger seat rail track, slide the heavy-gauge powder-coated steel slotted bracket underneath the bolt head (or attach the included secondary clamping hardware on raised seat tracks), and retorque the factory seat bolt.
• Rigid 18-Inch Bendable Aluminum Rod: Unlike cheap coiled gooseneck stalks that whip back and forth over every expansion joint, the RAM POD I uses a solid 18-inch rigid aluminum rod. You bend it once by hand to contour snugly along the side of your center console transmission tunnel, and it holds its shape without springy oscillation.
• Included 1-Inch B-Size Double Socket Arm at the Top: The top of the 18-inch rod terminates in a 1-inch B-size ball and double socket arm positioned right beside your gear shifter or climate controls, keeping your radio head out of windshield sight lines and airbag deployment zones.

For a full breakdown of how seat-rail goosenecks compare against cup-holder and custom dash brackets across different vehicles, check our companion guide on how to mount a HAM radio in a car.

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4. RAM Flat-Surface Drill-Down AMPS Mount (RAM-B-138U / RAM-B-101U) — Best for Permanent Installs

When you are outfitting a dedicated overland rig, work truck, fleet vehicle, marine helm, or home ham shack desk where permanent stability matters more than portability, a RAM Flat-Surface Drill-Down Mount is the most rigid solution in the catalog.

This complete assembly includes a 2.5-inch round 4-hole AMPS base plate (which screws directly into a flat dashboard panel, center console deck, or overhead radio shelf), a powder-coated marine-grade aluminum double socket arm, and an upper adapter plate that bolts to your radio cradle or control-head bracket.

• When to Choose B-Size (RAM-B-138U / RAM-B-101U): Ideal for detachable HAM control heads, handheld cradles (RAM-HOL-UN4U), and compact GMRS mobile units under 2 pounds.
• When to Upgrade to C-Size (RAM-101U with 1.5-Inch Balls): If you are bolting a full-chassis mobile HAM radio or a full-size CB radio U-bracket directly to a truck dash or transmission hump, step up to the 1.5-inch C-size drill-down mount so the 4-pound weight rating prevents the arm from drooping on washboard trails.
• Installation Tip for Thin Dash Plastic: Never rely on short self-tapping sheet-metal screws in thin, hollow ABS dashboard plastic. Whenever possible, pull the trim bezel, verify there are no wiring harnesses or supplemental airbags behind the panel, and through-bolt the 2.5-inch round base using stainless machine screws, wide fender washers, and nylock nuts. See our RAM flat surface mounts guide for detailed backing-plate techniques.

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Essential RAM Ball Adapters and Specialty Vehicle Bases

Whether you are completing the back of a RAM-HOL-UN4U Finger-Grip cradle or moving your handheld radio between a windshield, a motorcycle handlebar, and a truck cab, these three genuine RAM B-size components round out the modular ecosystem.

5. RAM 2-Hole Diamond Ball Base (RAM-B-238U) — Required Adapter for RAM Cradles

The RAM-B-238U Diamond Ball Base is the single most important connector piece in a RAM radio build. Cast from powder-coated marine-grade aluminum, its 2.43-inch by 1.31-inch diamond plate has two holes spaced 1.912 inches apart on center—the exact diagonal spacing of the industry-standard AMPS pattern—topped with a 1-inch B-size rubber ball.

You need at least one RAM-B-238U in two situations:

• Bolting to the Back of the RAM Finger-Grip (RAM-HOL-UN4U): As noted above, the Finger-Grip cradle does not have a ball molded into its spine. You press the two hex nylock nuts (included with the cradle) into the recessed hex slots inside the Finger-Grip spine and thread the two #8-32 machine screws through the RAM-B-238U diamond plate.
• Adapting Two-Hole HAM Control Head Brackets: Many compact Yaesu and Icom remote-head angle brackets use two mounting slots rather than four. Bolting a RAM-B-238U directly to that metal bracket turns your factory control-head clip into a 1-inch RAM ball head in two minutes.

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6. RAM 3.3-Inch Twist-Lock Suction Cup Base (RAM-B-224-1U) — Best for Windshields & Temporary Setups

If you operate a handheld HAM radio, GMRS portable, or Uniden scanner across multiple work trucks, rental cars, or storm-spotting vehicles where you cannot unbolt a seat rail or drill into the dash, the RAM-B-224-1U 3.3-Inch Twist-Lock Suction Cup Base provides a genuine industrial vacuum lock on any flat glass surface.

Unlike cheap push-on suction cups that peel off the windshield at the first temperature swing, the RAM-B-224-1U uses a mechanical cam-locking outer ring that pulls a deep vacuum seal across its 3.3-inch pad and comes pre-assembled with a 1-inch B-size diamond ball. Pair it with a short or standard double socket arm (RAM-B-201U) and let the bottom edge of your radio cradle lightly rest against the top of the dashboard to eliminate vertical bounce. Keep suction mounts strictly to handheld radios and lightweight remote heads—never hang a full-chassis metal transceiver from windshield glass.

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7. RAM Handlebar & Rail U-Bolt Base (RAM-B-231ZU) — Best for Motorcycles, ATVs & Grab Bars

For adventure motorcyclists, ATV/UTV trail riders, and Jeep or truck owners with tubular A-pillar grab handles, the RAM-B-231ZU Zinc-Coated Handlebar U-Bolt Base clamps a 1-inch B-size ball onto any round tube from 0.50 inches to 1.25 inches in diameter.

The kit ships with two stainless/zinc U-bolt sizes, a composite reduction shim for narrow 0.50-inch accessory crossbars, nylock nuts that will not back off under engine vibration, and black rubber thread caps. When mounting a handheld APRS/VHF transceiver or weatherproof remote head on a motorcycle or ATV, always pair the RAM-B-231ZU with a short 1.75-inch double socket arm (RAM-B-201U-A) to minimize cantilevered vibration, and loop a secondary wrist lanyard around the handlebar as a backup tether.

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Common Mistakes When Building a RAM Mount Radio Setup

• Ordering the RAM-HOL-UN4U Finger-Grip Without a Ball Adapter: The RAM-HOL-UN4U ships as a bare composite cradle with two screw holes on the back. Always add a RAM-B-238U diamond ball base so you have the 1-inch ball required to join your double socket arm.
• Using a 1-Inch B-Size Ball for a Full-Body Mobile Radio or Heavy CB: A 1-inch ball handles handheld HTs and separated control heads effortlessly, but a 3-to-5-pound all-in-one mobile radio or full-size CB chassis requires 1.5-inch C-size hardware (RAM-101U) to prevent the arm from sagging over bumps.
• Overextending the Socket Arm: Long 6-inch arms create a lever arm that magnifies dashboard vibration and coax cable tug. Use a standard 3-inch arm (RAM-B-201U) or short 1.75-inch arm (RAM-B-201U-A) whenever possible.
• Forgetting Antenna and BNC/SMA Coax Strain Relief: If you connect a stiff RG-58 or LMR-240 mobile antenna feedline directly to the top of a handheld radio in a cradle without an angled SMA-to-SO-239 flexible pigtail jumper, the weight of the coax will torque the radio’s fragile antenna jack and pull the mount off angle.
• Mounting Inside Passenger Airbag Zones: Never bolt or clamp a control head directly over a passenger-side dashboard airbag seam or A-pillar curtain airbag trim cover.

Frequently Asked Questions

Is the RAM Belt Clip Holder (RAM-HOL-BC1U) discontinued?

Yes. RAM Mounts discontinued the composite RAM-HOL-BC1U universal belt clip holder (as well as the bundled RAM-B-138-BC1U kit), and remaining stock has dried up across major retailers. The cleanest direct replacement for 1-inch RAM B-size socket arms is the HYSHIKRA 3-in-1 Aluminum Radio Belt Clip and Mic Bracket, which features an integrated 1-inch (25mm) rubber-coated ball on the back and accepts both handheld radio belt clips and round-button CB/HAM microphones without needing a separate diamond adapter plate.

How do I attach a Yaesu FTM-400, FTM-300, or Icom ID-5100 control head to a RAM Mount?

Detachable control heads from Yaesu, Icom, and Kenwood use either a factory metal angle bracket, a single M5 / 1/4-20 rear screw socket, or a magnetic/clip adapter (such as the Icom MBA-4/MBA-5 or Yaesu SMB-201). The two mounting slots on most control-head brackets line up with the 1.912-inch 2-hole AMPS spacing on a RAM-B-238U Diamond Ball Base or two diagonal holes on a RAM-B-202U 4-Hole Round AMPS Plate. Bolt the RAM ball plate to your radio’s control-head bracket using #8-32 pan-head machine screws and nylock nuts, then clamp the 1-inch ball into your RAM socket arm.

Will the RAM Finger-Grip (RAM-HOL-UN4U) hold down my radio’s PTT button?

No, provided you space the side fingers correctly during assembly. Because the RAM-HOL-UN4U uses four individual finger blocks that slide vertically along tracks on the left and right edges of the spine (and includes short, medium, and long finger sets), you can position the upper and lower fingers on the left side to straddle the Push-To-Talk paddle while leaving the speaker-mic and charging jacks completely unobstructed on the right side.

Can I mount a CB radio on a RAM Mount?

Yes, and the right setup depends on your CB size. Compact palm-sized CB and GMRS units (or handheld CBs like the Cobra HHRT50 and Midland 75-822) work well on 1-inch B-size hardware using the RAM Finger-Grip or HYSHIKRA belt-clip/mic bracket. Full-size metal mobile CB transceivers (such as the Cobra 29 LTD or Uniden Bearcat 980) should be bolted by their factory steel U-bracket to a 1.5-inch C-size RAM-101U flat-surface mount so the heavier chassis cannot slip.

Bottom Line

Building a reliable RAM mount ham radio setup comes down to matching the holder to your radio format and choosing the right vehicle base. For handheld HAM transceivers, GMRS walkie-talkies, and scanners, the RAM Finger-Grip Holder (RAM-HOL-UN4U) paired with a RAM-B-238U diamond ball adapter offers the most secure, button-friendly grip, while the HYSHIKRA 1-Inch Ball Belt Clip & Mic Bracket is the best all-metal upgrade for the discontinued RAM-HOL-BC1U. For detachable mobile HAM control heads, pair an AMPS ball plate with the RAM No-Drill Seat Bolt Mount for a clean console-side install, or step up to the RAM Flat-Surface Drill-Down Mount for permanent dash and fleet rigs.

If you want to compare non-RAM cup holder mounts, air vent mic clips, and magnetic off-road radio brackets, read our complete guide on mounting a HAM radio in the car, check our technical breakdown of AMPS pattern mounts, or browse our main GPS and specialized device mounts hub.