HF moxon

HF moxons are a particular challenge due to their large size and structural support needs.

See also:

• moxon for VHF and UHF moxons.
• Moxon calculator
• Cebik: Moxon Rectangles and Online Calculator

All the wire moxons can use these parts:

• feed point

  

• adjustable spacer
• both parts available from https://www.thingiverse.com/thing:9952

6m Horizontal moxon

Technically this is a VHF antenna, which makes more sense horizontal. But it's here because it's made of thin wire rather than being stiff like the other vhf moxons.

This moxon (pictured) is on a rotatable guyed tower.

Guy supports:

• lazy susan
• bearings to allow the tower to roll

Antenna parts:

• wire at least 1mm thick for best bandwidth
• feed point (above)
• 2x adjustable spacers (above)
• center hub (machined)
• driveway flagging fiberglass rods for spacers cut to length [1]
• corner supports
• coax for feed and air balun

10m vertical moxon

• 6ft broomstick makes a good top spreader, hang from tree by its center
• dacron rope can support coax, diagonal lines stabalize antenna, corner tails act as armstrong rotator
• weights tied to corner tails (6oz+ arborist bean bags or tent stakes) on ground to keep it aimed

20m horizontal moxon

This is about the largest practical size.

• 13.6ft spreaders assuming a center hub
  • may need to split spreaders in the middle

It is unclear if this is practical or has a good radiation pattern.