The half-wave flower pot is a good design. Or you can make a ribbon feeder J-pole as described here. 1/2 watt from Cyrn-y-Brain - #6 by MM0FMF Both are simple and relatively easy to build.
The half-wave flower pot is a good design. Or you can make a ribbon feeder J-pole as described here. 1/2 watt from Cyrn-y-Brain - #6 by MM0FMF Both are simple and relatively easy to build.