HF Mobile
Thanks for the input. As you suggested, I built a 1/2 wave DDRR Circumference is 37 1/2" using 1/4" copper tubing, and a solid copper ground plane. I could get it to work beautifully at 75MHZ where it is 1/4 wave length, but can't get it to work at 150 MHZ at all very high impedance...