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The Arizona Summit-to-Summit 10 Point Madness event provides a great opportunity to push the limits of 2m simplex and see what's possible over long distances. Although I didn't set any new personal records on this trip, some great contacts were made and plenty of fun was had.
The yagi is a homebrew design made from U-channel aluminum, steel hardware, and arrow shaft elements. The matching network is made from parallel 1/4 wavelength sections of 75 ohm coax to transform the 28 ohm yagi impedance up to 50 ohms. Those coax sections are wound a few times through a toroid as a common mode choke.
The boom is about 8 ft in length when extended and folds down to 32 inches. total weight of the antenna is about 2 lbs, and the pool cleaning pole mast adds another 2 lb or so.
MMANA GAL file: drive.google.c...
Links to Parts:
- Mast: amzn.to/3lzIZOp
- Arrow Shafts: amzn.to/2YygPdT
- Threaded Arrow Inserts: amzn.to/303BpTA
- 3/8" U-channel aluminum: www.homedepot....
- 1/2" U-channel aluminum: www.homedepot....
HARDWARE:
- Nylon Threaded Rod: www.mcmaster.c...
- Aluminum Threaded Rod: www.mcmaster.c...
... more durable alternative
- Stainless Steel Threaded Rod: www.mcmaster.c...
- Aluminum Hex Nut: www.mcmaster.c...
- Nylon Washers: www.mcmaster.c...