Inspect before retuning: 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.
After every deployment
- 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.
When something moves or the SWR changes
- Stop transmitting and make the structure safe.
- Inspect the base and work upward through every loaded interface.
- Correct mechanical movement, moisture, damage, and feed-line strain before changing antenna tuning.
- Rebuild the documented geometry and restart at low power.
Do not return to service
- 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.
Use the current CHA PORTA-MAST instructions.
Open Porta_Mast_User_Guide_221115.pdf · Open the product page
