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"Ionic Liquid" Antenna
"Roy Lewallen" wrote in message ... On 9/6/2010 5:06 PM, Frank wrote: On 7 MHz a dipole constructed of salt water: Er = 81, conductivity 5 S/m, and 0.5" diameter has a free space efficiency of 0.08%. i.e. with 100 W input the total radiated power = 80 mW. Frank (VE6CB) That looked so bad I had to run an analysis to see for myself. Sure enough, it's that bad. And even with a 0.25 inch diameter column at 146 MHz, the efficiency is only on the order of 1%. A foot and a half of wire vs. a pump, power source, and ferrite transformer? No contest. Roy Lewallen, W7EL - Finally, something to make a T2FD look good Wayne W5GIE |
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