Вот детекторный приемник в Америке 2004 год.
"Open Class
Dual 660/46 litz coils and two tuning capacitors.
differential coupling capacitor
Schottky Diode Detector
Sound powered headphones
Antenna 25 meter wire up 3 - 4 meters running east to west.
Entry: Dave Schmarder
Jan 30 2004
# Time(UTC) Call Freq Location Distance(km) Power(kW) Points
01 22:05 WEHH 1600 Horseheads, NY 18 5 200
03 22:10 WGMF 1490 Watkins Glen, NY 13 .4 200
04 22:11 WCLI 1450 Corning, NY 17 1 200
05 22:12 WELM 1410 Elmira, NY 19 5 200
06 22:13 WPHT 1210 Philadelphia, PA 301 50 641
07 22:17 WPIE 1160 Trumansburg, NY 38 .31 200
08 22:18 WHAM 1180 Rochester, NY 112 50 238
09 22:26 WYLF 850 Penn Yan, NY 48 .045 238
10 22:27 WWLZ 820 Horseheads, NY 14 .85 200
"