LINKED DIPOLES:
MANY BANDS, ONE WIRE

A linked dipole takes the simple dipole one step further. Instead of one fixed length, each leg is split into sections joined by removable electrical links. Open or close the links and you change the antenna’s electrical length, so one wire antenna can cover several bands, often without a tuner.

Linked dipoles are popular with portable operators because they’re light, cheap and easy to repair in the field. If you haven’t built a plain dipole yet, start with Build Your First Dipole.

How a Linked Dipole Works

Take a 40/20/10-meter antenna. The shortest section sits next to the center feedpoint, and longer sections extend outward through the links. With a link open, the wire beyond it is no longer part of the driven antenna. With it closed, that wire joins in.

• 10 meters: open both sets of links.
• 20 meters: close the inner links and open the outer links.
• 40 meters: close all links.

Both legs must be configured the same way. The exact section lengths still need adjusting, because the links, nearby wires and the installation all influence resonance.

Choosing Your Link Connectors

Common choices:

• Small insulated bullet connectors
• Anderson Powerpole connectors
• Weather-resistant plug-and-socket connectors
• Short jumper wires with secure terminals

Pick connectors that are mechanically solid, conduct well and are made for outdoor use. They shouldn’t carry the antenna’s tension. Put a short insulating support or strain relief across each link, so the antenna stays physically connected when the link is electrically open. That matters most in an inverted-V.

When you open a link, the outer section simply hangs from the strain relief. Its effect on the higher bands is usually small, but check each band again when you’re done.

Tuning Your Linked Dipole

Tune from the highest-frequency band down. For 40/20/10:

1. 10 meters first. Open all links and adjust the inner sections until the antenna resonates near your desired 10-meter frequency.
2. 20 meters second. Close the first set of links on both legs, leave the outer links open, and adjust the 20-meter extensions.
3. 40 meters third. Close all links and adjust the outer sections for 40 meters.

When every section is tuned, check each band again. Connectors and sections can interact, so small final tweaks are normal. Always change both legs equally to keep the antenna balanced.

Do You Need a Tuner?

A linked dipole can give acceptable SWR on its intended bands when the right links are connected and the antenna is properly tuned. But feedpoint impedance changes with height, wire layout and surroundings, and a tuner may still help in some installations. Low SWR doesn’t prove efficient radiation, especially with a lossy feedline.

Common Linked-Dipole Mistakes

Final Thoughts

A linked dipole adds multiband flexibility while staying light and portable. For POTA activators, campers and field operators it’s a practical alternative to carrying several antennas or leaning entirely on a tuner. Calculate, leave extra wire, tune one band at a time, and use an analyzer to finish.

73 from KPC — Build It, Test It, Get Outside, and Get on the Air!