Material: 5' length of 1/2" EMT electrical conduit.
(If you need the antenna farther from the tower, use a longer length of conduit.)
Step 1: Mark the conduit 6 inches from one end and 12 inches from the other.
Step 2: Put the arrow on the conduit bender at your 6 inch mark. In this photo the short end is to the right.
Bend the 6 inch end at 90 degrees.
To make the 12 inch bend, the six inch bend must hang straight down. I use a step.
Step 3: Again putting the arrow at the 12 inch mark, make another 90 degree bend. Keep the two bends in the same plane.
The wide angle camera lens distorts the picure. Both bends are really 90 degrees.
Step 4: Mount the antenna on the 6 inch end.
I used 2-inch automotive hose clamps clamps with this antenna.
Tape the coax to the EMT up to the where the tower leg will be.
Remember to stretch about three turns tightly but cut the tape with scissors
and do not stretch the last half turn or so.
That will keep the end from unraveling.
Mount the assembly on a tower. Use two 2-inch hose clamps on the tower leg.
Use a third clamp on a gird to keep the sidemout from swinging in the wind. My clamp is 1-1/2 inches.
My finished sidemount with a homebrew 220 MHz antenna. This is experimental, so I used RG58 and did not tape it to the tower leg.