Full-time RV life and HF radio are a natural pair. You're always somewhere new, always with a different propagation path, and always in need of something to do during those long evenings parked in the middle of nowhere. But building an HF station that survives 60 mph highway winds, runs off limited 12-volt power, and doesn't turn your RV into an RFI nightmare? That takes some planning.

This guide walks through everything you need to put together a reliable mobile HF setup for an RV, from radio selection through antenna mounting, power management, and the grounding headaches nobody warns you about.

Picking a Radio That Makes Sense for RV Life

You've got two real categories here: mobile rigs designed for vehicle use, and compact base stations that happen to work on 12 volts.

The Icom IC-7300 sits in that second category. It draws about 2 amps on receive and peaks around 21 amps at 100 watts on transmit. The built-in spectrum scope is genuinely useful when you're in a new location trying to figure out where the activity is. It's not technically a mobile radio — no vibration rating, no compact chassis — but thousands of RVers run them successfully with proper mounting.

For a purpose-built mobile rig, the Icom IC-7100 gives you HF through 70 cm in one box with a detachable head unit. The Yaesu FT-891 is another solid pick if you only need HF/6m. It's smaller, tougher, and pulls about 20 amps at full power. Around $700-800 street price.

The Xiegu G90 has carved out a following among RVers on a budget. Twenty watts, built-in tuner, $450ish. The power limitation matters less than you'd think when you pair it with FT8 or a decent antenna.

Here's the thing. I ran an FT-891 for two years in a Class C motorhome before switching to the IC-7300. The 891 survived everything — potholes in West Texas, summer heat in Arizona. But that waterfall display on the 7300 changed how I operate. Being able to see the whole band at a glance when you pull into a new campground and want to know what's happening? Worth the extra space.

Antenna Options: The Biggest Decision You'll Make

Your antenna choice determines 90% of your on-air experience. In an RV context, you're balancing performance, wind loading at highway speed, setup time, and whether you need your rig ready to transmit while driving.

Screwdriver Antennas (Drive and Transmit)

A motorized screwdriver antenna like the Tarheel Model 400A or Hi-Q 4/160 mounts permanently and tunes across HF bands via a motor that adjusts the coil tap point. The Tarheel 400A covers 3.5-54 MHz, handles 200 watts PEP, and stands about 6 feet tall collapsed.

Mount location matters enormously. A trailer hitch mount puts it at the rear with the vehicle body as a ground plane. The further from the body it gets, the worse your ground reference becomes.

I learned this the hard way at a rest stop outside Flagstaff. Mounted my first screwdriver on a diamond-plate bracket extending 18 inches off the rear bumper. SWR was all over the place, RF was getting into the chassis electronics, and my backup camera would glitch every time I keyed up on 40 meters. Moved it to a proper hitch mount flat against the frame and most of those problems disappeared.

Wire Antennas (Parked Operation)

If you only operate while parked, a simple wire antenna outperforms any mobile whip. Period.

A 40-meter dipole is about 66 feet total, fed with coax at the center. String it between trees, use a fiberglass mast at one end and a tree at the other, or go inverted-V with a single center support. Many RVers carry a 31-foot fiberglass crappie pole (about $40 from fishing supply stores) that collapses to 4 feet and doubles as an antenna mast.

The End-Fed Half-Wave (EFHW) has become incredibly popular for RV use. A 49:1 transformer at the feedpoint, 66 feet of wire for 40 through 10 meters, and a single support point. Throw the far end over a branch. Done in five minutes.

Compromise: Hamstick Dipoles

A pair of Hamstick-type antennas mounted in a dipole configuration on a mast gives you reasonable performance with minimal setup. They're band-specific (you need a pair per band), but at $25-30 each, carrying sets for 20m and 40m isn't unreasonable.

Power: The Math Nobody Wants to Do

A 100-watt HF radio pulls 20-22 amps on transmit. At 50% duty cycle (SSB ragchewing), average draw is around 11-12 amps. On FT8 with its 15-second transmit cycles, average current is roughly 10 amps.

For a typical operating session of 2 hours, you're looking at 20-24 amp-hours consumed. That's meaningful if you're running on batteries alone.

Lithium vs. lead-acid: Most modern RV electrical systems use lithium iron phosphate (LiFePO4) house batteries. A 200Ah lithium bank gives you usable capacity of about 190Ah (95% depth of discharge). That's plenty for a day of casual operating.

If you're still on lead-acid, you've only got 50% usable capacity, so that 200Ah bank is really 100Ah usable. Two hours of SSB could eat 20% of your available power.

Solar: A 400-watt solar array in good sun generates roughly 25-30 amps at midday. That more than covers operating an HF rig. Most full-time RVers I know carry 400-800 watts of solar — enough to operate radio indefinitely as long as they're getting sun.

Nope, you don't need a generator for ham radio unless you're running a legal-limit amplifier. And if you're running a kilowatt amp in an RV park, you've got other problems.

Grounding and Bonding in an RV

This section could fill an entire article on its own. RVs are terrible RF ground platforms. The frame is often isolated from the body panels by rubber bushings, the aluminum skin may or may not be electrically continuous, and you've got computers, LED drivers, and inverters generating hash everywhere.

The minimum approach:

  • Bond the radio chassis to the vehicle frame with heavy copper braid (minimum #4 AWG equivalent)
  • Keep the bond as short as possible — under 3 feet
  • Connect the antenna mount directly to the frame
  • When parked, drive a ground rod and connect it to the radio's ground terminal

For RF noise reduction:

  • Add ferrite chokes (Fair-Rite #31 mix snap-ons) to the radio's DC power cable, coax shield at the radio end, and any USB cables
  • Run the radio from house batteries, not through an inverter. Direct 12V DC from the battery bank through properly fused wiring
  • LED lights are notorious RFI generators. If you're hearing S7 noise floor that drops when you kill the lights, there's your culprit

Coax Routing and Installation

RG-8X is the practical choice for RV installations — flexible enough to route through compartments, low enough loss for the short runs involved. For a typical 15-20 foot run from radio to antenna, RG-8X loses about 0.5 dB at 30 MHz. That's insignificant.

Don't use RG-58. The loss difference is real — about 1 dB more per 25 feet at HF — and the shielding is worse, which means more noise pickup.

Route coax away from 120V AC wiring, inverter cables, and solar charge controller wires. Through-wall penetrations should use weatherproof bulkhead connectors, not "drill a hole and shove the cable through" (which I've seen in more RVs than I'd like to admit).

Operating Tips Specific to RV Life

A few things I've picked up after three years on the road:

Parks on the Air (POTA) and RVing are perfect together. Many national forest campgrounds and state parks qualify as POTA entities. You're already there — just set up an antenna and activate. I've logged over 40 POTA activations without making a single special trip.

Join the RV nets. The Escapees Ham Radio Net meets on 7.268 MHz LSB at 8:00 AM Central. The PRIOR (Pacific RV Inter-Network Operating Resource) group runs on 7.235 MHz at 8:00 AM Pacific. Good places to get campground recommendations from fellow hams.

Band selection by time of day: When parked at a new location, 20 meters (14.0-14.350 MHz) is your best bet during daylight hours. After dark, move to 40 meters (7.0-7.3 MHz) or 80 meters (3.5-4.0 MHz). This is basic propagation, but it matters more when you don't have a beam antenna to force contacts.

Watch your RFI signature at RV parks. If you're interfering with your neighbor's TV or WiFi router, you'll get complaints fast. Run the minimum power necessary, use a tuner to keep feedline SWR low (reducing common-mode current), and introduce yourself to neighbors before you start transmitting. Most people are curious, not hostile.

Budget Breakdown: What This Actually Costs

Component Budget Option Mid-Range High-End Radio Xiegu G90 ($450) Yaesu FT-891 ($750) Icom IC-7300 ($1,100) Antenna (mobile) Hamstick dipole ($70/pair) Tarheel Little Tarheel II ($400) Tarheel 400A ($600) Antenna (parked) EFHW wire ($60 DIY) MyAntennas EFHW-4010 ($130) SteppIR CrankIR ($1,400) Mount Hitch mount ($50-80) Breedlove mount ($150) Custom fabricated ($300+) Power cable/fuses $30-50 $30-50 $30-50 Coax + connectors $40-60 $40-60 $40-60 Total $700-770 $1,500-1,540 $3,470-3,510

Common Mistakes to Avoid

  • Running coax next to the LP gas lines (fire hazard and noise coupling)
  • Transmitting without verifying SWR after setting up at a new location. Trees, metal buildings, and wet ground all shift your antenna tuning
  • Skipping the fuse on the DC power run. Put a fuse within 18 inches of the positive battery terminal. Always.
  • Using a cigarette lighter socket for power. They're limited to 10-15 amps and the connections corrode. Run dedicated wiring from the battery bank

Wrapping Up

The best mobile HF setup is one you'll actually use. I've seen pristine IC-7300s collecting dust because the owner made antenna deployment a 45-minute process. And I've seen guys with nothing but a G90 and a wire in a tree working DX from a Walmart parking lot.

Start simple. A basic radio, a wire antenna, and a way to get it in the air. You can always add a screwdriver antenna or a fancier rig later. The propagation doesn't care how much you spent — it cares whether your signal is getting out.

73, and see you on the air from whatever campground you're parked at tonight.