BUILD NOTE: The video makes it look like I solder the toroid on incorrectly because of changes to the toroid off-camera. Be sure to solder the end of the wire ONE lap around the torioid (about 9 turns) from the tap (center conductor) to GROUND, and the end of the wire TWO laps around the toroid (about 18 turns) to the radiating wire. For the 9:1 unun, follow the wiring diagram here: [ Ссылка ]
Here it is, finally! The build video for my Micro 9:1 Random Wire Antenna. Hope you have fun with this. Post any questions in the comments, and let me know if you're successful in building one of these.
See it in use: [ Ссылка ]
WARNING: This is a really difficult build. Consider NOT attacking this as your first antenna project. I've got more antenna projects coming, so stay tuned.
For the 9:1 unun, follow the wiring diagram here: [ Ссылка ]
Parts List from Amazon:
Needed Materials:
- Special BNC connectors: [ Ссылка ]
- Toroids for this project are FT50-61: [ Ссылка ]
- 28 ga magnet wire: [ Ссылка ]
- Poly-Stealth 26 ga antenna wire. I've ordered from this company a few times and had great service: [ Ссылка ]
- 5 minute epoxy: [ Ссылка ]
- 5/8" or 3/4" heat shrink tubing (adhesive lined preferred): [ Ссылка ]
- 3/32" or 1/8" heat shrink tubing: [ Ссылка ]
I chose a 41' radiating element and 17' counterpoise which works great for 60-10m with most tuners. Your goal is to choose lengths that are NON-resonant on any band you want to use. Here's a reference for more info and an explanation:
[ Ссылка ]
So, interestingly, random wire antennas aren't in-fact random at all. Mind: blown. :-)
