I'm putting together a cantenna like the one here:
The instructions say to use 12 gauge copper wire for the N-connector. The photo shows solid wire. I have some 12 gauge twisted copper wire. Will that work?
Also, the writer says the can's dimensions are important. The one I want to use it 4" diameter x 6" length (the calculator says to put the N-connector 1.72 inches from the bottom). Are those good dimensions or should I look for another can? Thx.
The same calculator that says 1.72" for the probe also says 5.15 as the 3/4 length, which is explained in the text just below as the minimum desireable, so you should be okay at 6" in length. It would be better to be a full wavelength, listed in the chart as 6.87, but you have what you have. You could solder two of your cans together to get more length.
In the real world, my two-can cantenna seemed to be a little stronger, but too directional. It was tripod mounted by soldering a 1/4-20 nut to the outside, but it would drift off target.
Bob Alston used a single coffee can.
My user preferred a single larger coffee can. Not as strong, but more stable. The "3lb" can is 6" in diameter, which is too low in frequency range according to the calculator, but more acceptable in use.