The elements have been made from silicon bronze welding rod, aluminum rod, hobby tubing and solid ground wire with no change in performance. A good coat of Polyurethane should be applied to the wooden boom to protect it from the weather. A polyurethane varnished 902 MHz version has been in the air for a year now with little deterioration in performance. And now for the antenna designs. See Figure 1 for details on the driven element.
All dimensions are in inches.
This antenna is peaked for 222.1 MHz but performance bearly changes at 223.5 MHz. This antenna is peaked for 432.1 MHz. At this frequency, this antenna is getting very practical and easy to build. This was the first antenna I built using the antenna to control the driven element impedance. Dimensions must be followed with great care.