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Dead key and swing. I love this. Let me pose a question and then try to make a point:
1. RF is AC not DC current right? ok....
2. If your dead key is 4 watts with 4 watts of forward swing (8 watts total), the negative part of the sine wave will go to 0 watts. Right? All is good...
That is simply not true. You do not understand how the electrical and magnetic fields cancel each other on ladder line and create the balance. Coax is not BALANCED. The current and fields go one inside the other in coax, balance is impossible.
IMHO 600 ohm ladder line is the way to go. I used a piece of pvc at the top of my mast, slit it and held it in place with a hose clamp. Been up for about 2 years so far. You just got to try things. What works for someone else may not work for you and vica versa. Soil conditions, nearby...
Those antenna will work fine if you get them out in free air - here is how I did mine. I used PVC to make a mast and then put it on a roof vent with a PVC coupler. BINGO - talked all over the US on 11 meters.
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