The short answer: CHA PORTA-MAST turns a home, RV, or vehicle site into a repeatable antenna position without a permanent tower. The 15, 20, and 25 ft aluminum masts telescope down below eight feet and accept documented ground-sleeve, wall, deck, wheel, or hitch installations.
What should I decide before buying?
- Use 15 ft when the smaller 2.5 in base and 14 lb mast meet the job.
- Use 20 or 25 ft when the 3 in base and larger published wind-area capacity are required.
- Choose Wheel or Hitch Mount for temporary vehicle-supported deployment; choose Ground Sleeve, Top Mount, or Side Mount for the documented semi-permanent paths.
- Add the Mast Adapter only for antennas or rotators that require its 3/8-24 socket or 1 in by 6 in shaft.
What must match during setup?
- The swivel ring supports documented HF wire endpoints or feedpoints.
- Verticals, loops, Yagis, rotators, and 3/8-24 antennas require the optional Mast Adapter.
- The 15 ft model is rated for 2.2 sq ft maximum antenna wind area; 20 and 25 ft models are rated for 3.3 sq ft under the guide conditions.
- The published wind-survival figures apply only to a properly installed in-ground mount within the wind-area limit.
What deserves a stop and recheck?
- Never raise or lower the mast near power lines or without control of the fall zone.
- Do not install during unsafe wind; get another person when the weight or site demands it.
- Do not let a telescoping section drop free.
- Treat temporary vehicle mounts and semi-permanent structure mounts as different installation paths.
How should I put it away?
- Lower from the lowest extended section upward with two-handed control.
- Inspect interlocks, tubing, swivel ring, cap, mount, and fasteners.
- Keep the top capped against water intrusion.
- Do not use tubing deformed by direct bracket clamps or impact.
Use the current CHA PORTA-MAST instructions.
Open Porta_Mast_User_Guide_221115.pdf · Open the product page
