VERSA-BEAM

2 METER 4 ELEMENT QUAD BEAM
10 db GAIN and LESS THAN 4 FEET
APPROX COST: $20 PVC & $20 COAX AND CONNECTOR


I built this antenna to use up at the cabin to stay in contact while in the woods. There is no electricity or phone up there so my handheld and a 12 volt 7 amphour NiCad battery will have to do. The original plans I started with called for wood but I felt a PVC version would be more durable (and fun to build too). The specifications have not been changed, but the names have been changed to protect the innocent. Use the 14 gauge wire listed in the parts list for the loops.

I cut the prototype piece by piece as I calculated the spans and boom lengths, and prefit and assembled it without glue first. I kept a log of all my results and condensed them in the ‘pipe cuts’ lists. All the glued fittings must be bottomed to keep the measurements accurate; I calculated everything that way. Use 14 gauge wire!

1" and ˝" Crosses must be perpendicular to each other, they may appear parallel in the drawings, that was for simplicity. The ‘cutaway detail’ shows the positions of the 5 cross stubs, they are not seen when it is all assembled. The boom is all 1" and the spans are all ˝". Take your time, PVC glue gives you lots of time.. NOT! (LOL)
Drill 1/8" holes 1" from the end of each span, you choose whether you drill before or after gluing. I used a jig for the holes, plans available for $49 (It’s a 2" square piece of tin with a 1/8" hole in it’s center that I wrapped around the span, I’ll sell you one of those for $49 too). The passive elements are done as in the ‘loop detail’ drawing at right (three total).
The active element (driven) is a little trickier. Side feed will render vertical polarization (which I used since planning to hit a vertical repeater antenna from a distance, and bottom feed will render horizontal polarization (best for simplex between two beams). This was my solution, feel free if you think you can improve it.

Once you have cut all the pieces and are ready to glue, remember adequate ventilation! ("WOW man, look at all the pretty colors")

I just wire tied the coax to the mast and across the span, feed it up the inside of the pipe if you want to get fancy. I cut the coax to multiples of the wavelength, I’ve always done this and things turn out happier. I tune whips by coax length and am testing lengths for the beam as we speak. I also drilled small holes in the bottom span caps to leak any rain that might follow the wires into the holes.

If you prefer I will cut, glue, and assemble one each said antenna for the resonable price of $60 Plus shipping and coax


PARTS LIST
QUANTITYDESCRIPTION
3
2
8
4
16
1
2
30'
1" tee
1" cross
1" x ˝" flush bushing
˝" cross
˝" end cap (optional)
1" x 10' PVC pipe
˝" x 10' PVC pipe
14 guage copper wire
------------
˝" PIPE CUTS
QUANTITIYLENGTHDESCRIPTION
3
1
3
1
3
1
3
1
4
15 9/16
11 9/16
14 21/32
10 21/32
14 1/8
10 1/8
13 7/16
9 7/16
1 1/2
top and side spans, reflector
bottom span, reflector
top and side spans, driven
bottom span, driven
top and side spans, director 1
bottom span, director 1
top and side spans, director 2
bottom span, director 2
stubs for crosses
------------
1" PIPE CUTS
QUANTITYLENGTHDESCRIPTION
1
1
1
1
18 3/4
2
7 5/16
11 3/8
reflector boom
mast tee stub
director 1 boom
director 2 boom

Designed, built, and tested by KC0CHL.
Testing assistant KC0EIN.

For information e-mail KC0CHL


A great tool for quad designers I found after I built this one
CUBICAL QUAD ANTENNA CALCULATOR

History of the Cubical Quad Antenna


Page designed and written by Luther, KC0CHL