• You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
  • Notice: You may not use this site to facilitate the unauthorized selling of copyrighted material including, but not limited to, in the public dxForums, dxGallery, dxChat and private messsages. If you get caught doing this, you will be permanently banned with no second chances. A notice will be placed on the site of why you were banned and any information collected by this site about you will be made known to the copyright holder.

Home Homebrew 1/4 Wave 10 Meter Ground Plane

Riverman

Old Member
Nov 12, 2013
2,659
2,634
273
Easy Peasy. Works great!

Used this: https://m0ukd.com/calculators/quarter-wave-ground-plane-antenna-calculator/

Came up with 98.77" for the vertical. Had a Buddistick shockcord antenna I trimmed to 99 inches. Aluminum tubing or even a crappie pole and wire should work as well.

Attached it to a typical stud connector and mirror bracket atop a 4.5' light stand from Lowes. https://www.lowes.com/pd/CRAFTSMAN-72-04-in-to-72-04-in-Plastic-Work-Light-Stands/1000655903

Used 16 ga. wire for radial. Started with 110" and trimmed for lowest SWR at 28.400 MGZ (10 Meter Calling Channel). Wound up with a SWR of 1.02 using a tick over 100".

Trying to approximate an angle of 76.5 degrees, I attached it to the top notch on my electric fence post. (76.5 is the recommended angle for achieving an impedance of 50 ohms when using a single elevated radial. 45 degrees is recommended when two or more or used. https://www.qsl.net/kk4obi/Elevated Radials.html.)

10 meters is still pretty quiet but opens up occasionally during the day, especially in the afternoons here in north Texas. When it does, it is mostly DX and rarely stateside. :)

10 Meter Antenna.jpg 10 Meter.jpg IMG_1037.jpg IMG_1030.jpg IMG_1032.jpg
 

Riverman

Old Member
Nov 12, 2013
2,659
2,634
273
I suggest to use choke balun and insulate antenna and radial(s) from mounting pole.
Mike

Mike, I gave that thought during construction. But if I have CMC, it is miniscule. It is easy to detect when using the analyzer as the readings will jump around, especially when touching the radio or coax connectors. I had that when using the Buddistick coil and had to use ferrite beads, but I don't have that with this setup. Don't know why. It' s clear the stand is part of the ground plane since the bracket is not insulated from it, but the readings are stable and good and the antenna is working great, so see no reason to mess with it. :p
 

Riverman

Old Member
Nov 12, 2013
2,659
2,634
273
I suggest to use choke balun and insulate antenna and radial(s) from mounting pole.
Also I would use 3-4 radials instead of one. Just one skew antenna pattern.
Mike

Nope, I'm a one radial guy. I love 'em. Less to walk around in the yard and a whole lot less hassle during mowing season. It's my experience these antennas are omni-directional. Although this radial is pointed northeast, I've easily made 5/9 contacts off the sides and back as I have with other similar setups. Sometimes the book stuff just doesn't come to fruition. :)
 

Riverman

Old Member
Nov 12, 2013
2,659
2,634
273
Without a choke balun you have 2 radials :)

(y) My coax might be radiating, but it doesn’t light up my callsign display or make the hair on my neck tingle. And it lets me talk to Spain, so I’m good with it doing its thing. ;)
 

Riverman

Old Member
Nov 12, 2013
2,659
2,634
273
So, if it is your key parameter... I talked all over the world from barb wire fence. It doesn't make it good antenna.

Mine is simple, stealthy and works great. Am very happy with it. No matter what it's called. (y)
 
Last edited:

dxChat
Help Users
  • No one is chatting at the moment.