Total posts : 45366
i finally got a chance to test out radio8z’s method. i used a radioshack 100uH rf choke and two 3ft lengths of 18awg stranded copper wire with a hp 54600b oscilloscope.
here are a couple photos. i took them after putting away the oscilloscope but you can see the dipole and choke in relation to my transmitter setup. http://i.imgur.com/wY69A.jpg http://i.imgur.com/xIr2s.jpg
with the amt3000 turned off i was seeing about 400mV on my scope. with it turned on and the antenna tuned to 10.5v peak the scope was reading between 680mV and 720mV. i tried adjusting the antenna off resonance to see what would happen but the scope tended to stay in that range unless i dropped the antenna way out of tune (1 or 2v peak reported about 500mV on the oscilloscope).
my conclusion is that the scope is not an ideal field strength reader. its really difficult to see a peak on a scope. i would imagine that an analog meter would be much easier to read.