How to aim and install a yagi

This page is general education for homeowners and radio hobbyists. It is not a certified engineering plan, electrical inspection, or substitute for manufacturer instructions.

Aiming basics

1. Know the target: Broadcast towers for TV, a cell site for boosters, or a repeater/satellite path for ham.
2. Compass + map: Convert tower coordinates to a bearing from your location. Account for magnetic declination if you use a magnetic compass.
3. Peak, then lock: For TV, run a signal meter or channel scan while a helper rotates the mast a few degrees at a time. For ham, listen for peak signal / best SNR.
4. Watch multipath: Reflections off buildings or hills can create false peaks. Prefer the heading that stays stable.

Mast & mounting

• Use hardware rated for outdoor wind loads; follow the antenna’s mast-diameter range (many compact yagis list ~30–40 mm clamps).
• Keep the boom level (or as specified) and elements oriented for the intended polarization.
• Leave drip loops in coax so water does not run into connectors or wall penetrations.

Coax & grounding (basics)

• Match cable type to the system: 75 Ω RG6 is common for TV; 50 Ω coax is typical for ham and many booster kits.
• Weatherproof outdoor connectors (self-amalgamating tape / approved sealants as appropriate).
• Bonding and grounding of masts and entry panels should follow the National Electrical Code and local amendments — when in doubt, hire a qualified electrician or professional antenna installer.

After install

Rescan TV channels, confirm booster status lights, or check SWR/power with appropriate ham test gear. Re-check hardware after the first big windstorm.