Build from the base upward: The CHA CFM-34HD is the heavy-duty temporary mast for operators who need real field height with more load capacity. It extends to 33 ft 7 in, collapses to 5 ft 7 1/2 in, weighs 4 lb 13 oz, and carries a published 6 lb limit when the height, antenna, wind, and guying rules are respected.
Deployment sequence
- Select the base, required collar or reducer, and guying plan before raising the mast.
- On CHA SPIKE MOUNT, seat the CHA 34HD COLLAR so the mast shoulder—not the 3/8-24 stud—carries the base load.
- Extend only the number of sections allowed for that exact antenna configuration.
- For PORTA-MOUNTS, install the complete CHA 34HD REDUCER KIT; the base collar does not replace it.
Before raising the antenna
- Plan transport around the 5 ft 7 1/2 in collapsed length.
- Use the 21 in CHA SPIKE MOUNT only with the mandatory CHA 34HD COLLAR; use CHA SURVEYOR-A without that collar; use any PORTA-MOUNT only through the complete CHA 34HD REDUCER KIT.
- Reduce load and use guying for tall, high-area, or windy configurations even below the nominal 6 lb limit.
Before transmitting
- Confirm every mast section, clamp, mount, adapter, guy line, antenna attachment, coax route, and RF-return conductor.
- Begin RF checks at low power after the final geometry is stable.
- Record the exact configuration so a successful setup can be reproduced.
- Never place the CFM-34 HD directly on the narrow Spike Mount surface; concentrated leverage can bend the 3/8-24 base stud.
- Guy whenever the table requires it and whenever wind, load, or surface area calls for more stability.
Use the current CHA CFM-34HD instructions.
