A friend of mine lost his IC-7610, an amplifier, and a computer to a lightning strike in 2021. The bolt hit a tree 40 feet from his tower. His total grounding system was a single ground rod connected to the radio with 18-gauge wire.

Insurance covered most of it. But the three months without a station? That's the real cost.

Proper grounding won't make you lightning-proof — nothing does. But it dramatically reduces the damage when (not if) your area gets hit.

Two Kinds of Grounding (Don't Confuse Them)

RF Ground

Provides a low-impedance path for RF currents. Reduces noise on receive. Necessary for certain antenna types (verticals, random wires). NOT about safety.

Safety/Lightning Ground

Provides a path for lightning-induced energy to reach Earth without passing through your equipment. This is what prevents fires and fried radios.

Both matter. They're different systems with different requirements, though they often connect at the same point.

The Station Ground System

Ground Rod(s)

Minimum: one 8-foot copper-clad ground rod driven fully into the earth, within 5 feet of where your feedlines enter the house.

Better: two or three rods, spaced 8-16 feet apart, bonded together with heavy copper (#6 AWG or larger).

Bond your station ground to the house electrical ground. This is code-required (NEC 810) and critical for safety. If the station ground and electrical ground are at different potentials during a surge, voltage differences destroy equipment connected to both (your radio plugged into AC power AND connected to an antenna = two ground references = problem).

Ground Bus Bar

A copper bus bar (or thick copper plate) mounted near your operating position. Every piece of equipment connects to this bus via short, heavy copper straps. The bus connects to the external ground rod(s) via the shortest possible path.

Short is the key word. A 50-foot ground wire isn't a ground — it's an inductor. At lightning frequencies (broadband RF impulse), length = impedance. Keep the path from equipment to earth under 10 feet if physically possible.

Copper Strap vs Wire

Flat copper strap (1.5" wide or more) is better than round wire for grounds. Lower inductance at high frequencies. A 3-foot strap to your ground rod does more than 20 feet of #6 wire.

I use 2" copper strap from my bus bar, through the wall, directly to a ground rod 3 feet outside. Cost $25 for 6 feet from a surplus shop.

Feedline Entry

Every coax and control cable entering your house should pass through a single-point ground panel. This is a metal plate mounted on the exterior wall where all cables bond to ground before entering the structure.

Polyphaser/Alpha Delta surge protectors mount on this panel. Each coax passes through a gas-discharge tube that shorts to ground during a surge. They're $30-60 per connector. Worth every penny.

My entry panel:

  • Two coax bulkhead connectors with Polyphaser IS-50NX-C2 protectors
  • One rotator control cable pass-through
  • Heavy ground strap to rod directly below

What Actually Happens During a Strike

Lightning doesn't need to hit your antenna directly. A nearby strike (within 100-200 feet) induces thousands of volts on your feedlines and antenna system through electromagnetic coupling.

The surge travels down your coax, arrives at your radio, and finds a path to ground — through your radio's sensitive front-end circuitry. Components rated for millivolts receive kilovolts. They don't survive.

Gas-discharge protectors clamp these surges to ground before they reach equipment. A properly bonded ground system gives that energy somewhere to go that isn't your IC-7300.

The Disconnect Method

The single most effective lightning protection: disconnect everything when you're not operating.

Seriously. Unplug coax from the radio. Disconnect from the antenna switch. Ground the disconnected coax to your bus bar.

A friend who's been ham since 1975 has never lost equipment to lightning. His secret: he disconnects coax at the entry panel whenever he's done operating. Cable ends bolt to the ground panel. His radio connects to nothing when he's not in the chair.

Low-tech. 100% effective when disconnected.

Minimum Viable Protection

If you do nothing else:

  1. One ground rod, bonded to house electrical ground
  2. One surge protector (Polyphaser or Alpha Delta) on each feedline
  3. Disconnect coax when not operating
  4. Surge-protected power strip for AC power to the shack

This covers 90% of scenarios for typical suburban stations. Not perfect. But the difference between this and nothing is the difference between losing a $40 surge protector and losing a $3,000 radio.

What Doesn't Work

  • Grounding to a water pipe (alone): Not reliable. Plastic fittings, unknown path to earth, not guaranteed continuous metal.
  • Long ground wire runs: 50 feet of wire to a distant rod is nearly useless at lightning frequencies. Keep it short.
  • Relying only on AC surge protectors: They protect the power side. Your antenna feedline is the primary lightning path into the shack.
  • Single thin ground wire: #14 wire to a ground rod looks connected but has too much impedance to carry a surge safely.

Tower Considerations

If you have a tower:

  • Ground at the base with minimum 3 rods in a triangle, bonded with #2 AWG or heavier
  • Ground halfway up on tall towers (additional rod)
  • Use hardline or coax with grounded shields
  • Cad-weld bonds over mechanical clamps for permanent installations
  • Bond tower base ground to house ground with heavy copper (#4 or larger)

Towers actually help during storms — they provide a preferred path to ground that routes energy AWAY from the shack. But only if properly grounded.

Do It Now

I put off grounding for two years because it seemed like a weekend project I'd "get to eventually." Then I watched that lightning storm from my window and realized my entire station was one unlucky bolt away from a GoFundMe page.

Drove stakes that weekend. Mounted the panel the following Saturday. Sleep better during storms now.