From the ARRL Letter, October 5, 2006:
IARU Region 2 Monitoring System Coordinator Bill Zellers, WA4FKI, says Amateur Radio stations on the West Coast and as far east as Arizona have reported hearing over-the-horizon radar signals on the low bands. VE7BZ in British Columbia recorded the radar’s signal October 1, 1353 UTC, on 3.795 MHz Hear a recording of the signal.
The radar, apparently located on Hainan Island, Peoples Republic of China, has shown up on 160, 80 and 40 meters and sometimes is quite strong. On 80/75 meters it appears as high as 3.8 MHz, while on 40 meters, it’s showing up on the lower 25 kHz or so. Typically there are about 50 seconds between signal pulses. He said the radar signals are strongest on a heading of between 285 and 320 degrees from California or Arizona.
Zellers requests reports from stations hearing the over-the-horizon radar signals as well as any other signals that do not appear to belong on the amateur bands. He suggests the following report format: Your call sign, time in UTC, frequency, emission type, signal strength, propagation and signal bandwidth in kHz. Send reports
to Zeller via e-mail.