A marriage of the windom and slinky antennas
Experimental home brew antenna
A construction article by NC4TC
A panoramic view hand stitched so not as slick as Autostitch
just click on the area you would like to see enlarged
The following is a pictoral account of my experimental Helically wound windom antenna. A complete construction account will be forthcoming .
The components of my helical windom
- RG8X mini low loss coax from The Wireman coax #118
- 100 ft dual 18 gauge speaker wire from Big Lots (cheap). I ripped it apart for the antenna wire.
- 2 pieces 10 ft, 1.5 inch Diameter PVC conduit.
- Assorted cable ties.
- Coax hardware, PL239, PL259 etc.
- Balun Kit from the Wireman (see reference later).
- MFJ 204b antenna bridge.
- Assorted tools not shown.
The pvc conduit was cut into 4 pieces 5', 5', 6', 4'
I was anticipating locating it in my attic.
Actually it worked out very well for winding the antenna wire on it.
I purchased a balun kit from The Wireman
The instructions below came with the kit.
The antenna measured approximately 450 ohms so changing the instructions to read matching to 450 ohms, with RG-8X coax (50 ohms) . Then 9-1 ratio becomes 450-50
The Balun instructions were as shown above but I redrew them to make an easier assembly for me
This was the first balun I have assembled
Ready to be sealed
The balun was wrapped with linerless rubber tape which will seal it from moisture.
Secured with a cable tie and soldered to antenna ends which were later wrapped with vinyl tape.
The connection will also be waterproofed.
The white strips are white duct tape securing the ends of the wire.
For some reason I could not find my gray tape.
The short end of the OFC (4 feet) and outdoor antenna workshop
My inspiration for this balun was from The ugly balun
The long end of the OCF ( 16 ft)
The antenna wire was wrapped on separate pieces of conduit and joinned together and soldered.
The 16 ft. section is two 5 ft. pieces and a 6' piece.
The other section is 4 ft. joined to the feedline with the balun.
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