CHA 34HD REDUCER KIT · MOUNTING & SUPPORT
The controlled adapter that centers and secures a CHA CFM-34 HD in a 3-inch CHA PORTA-MOUNT.
Turn the heavy-duty mast into a secure vehicle-supported station
Fit the CHA CFM-34 HD correctly in a 3-inch CHA PORTA-MOUNT
The CHA 34HD REDUCER KIT solves the fit problem between the larger CHA CFM-34 HD mast and the 3-inch CHA PORTA-MOUNT family. It lets an operator use the heavy-duty carbon-fiber mast from a hitch, wheel, side, or top mount without improvising spacers or accepting a loose, unstable fit.
A lower support sleeve centers the mast inside the mount while the two-piece upper reducer secures it at the top. Together with the supplied stainless hardware, they create the controlled mechanical interface the HD mast needs—without pretending to increase the load rating of the mast, mount, vehicle, or antenna above it.
See every part in position
Upper retention and lower support work together
The official Quick Start shows exactly where the two reducer halves, lower sleeve, and supplied hardware belong.

Quick product reference
What is included
- Upper reducer
- Two interlocking ASA sections
- Lower stabilizer
- One lower support sleeve
- Hardware
- Supplied stainless steel fasteners
- Mast
- CHA CFM-34 HD only
- Mount interface
- 3-inch CHA PORTA-MOUNT
- Documented PORTA-MOUNTS
- Hitch, Wheel, Side and Top
- RF role
- None; mechanical interface only
- Load rule
- Use the lowest applicable limit in the complete support chain
Installation order
- Install the lower support sleeve/stabilizer in the PORTA-MOUNT as shown.
- Insert the CHA CFM-34 HD with its documented mast support sleeves in place.
- Fit the two upper reducer sections around the mast.
- Install and tighten the supplied hardware evenly.
- Verify centering, retention and overturning stability before extending the mast.