For anyone who is interested here are some 136kHz EWE/Flag dimensions from
Floyd Koontz
The top wire is 15ft above ground and the bottom wire is 5ft above ground
the lengths 100ft - 350ft are for the top and bottom wires
Rf is feedpoint impedance and Rt is termination resistor
100ft -66dbi, f/b 38db Rf =1136, Rt=1139
150ft -63dbi, f/b 31db Rf=1128, Rt=1142
200ft -60dbi f/b=30db Rf=1124 Rt=1146
250ft -55dbi, f/b=35db Rf=518 Rt=522
300ft -54dbi f/b=40db Rf=512 Rt=522
350ft -53dbi f/b=21db Rf=445 Rt=460
Looks like 250-300 ft a good choice and a good match at 450 ohms
73s Tracey
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