LF: LF antenna voltage

[MarkusVester@aol.com]

Laurie,

on our LF antennas the voltage is almost constant along the wire, so its peak 
value is simply
Up = 1.41 * I_eff / (2 * pi *f * C) ;
e.g. with 600pF antenna capacitance and 3 amps, you will get 15.6 kV on 72 
kHz, which shouldn't be a problem in dry weather. My thin 137 kHz ant is 
similar with 1.5 amps into 170 pF, giving 14.6 kV. One of the 1 mm perlon 
strings once melted when it was attatched to the wire end without any 
insulator.
73 de Markus