This is from the ARRL. It is a bit of a stretch for posting here but the Aux does have Amateur Radio Operators as members and an HF program so I thought there might be some interest.
quote:
ZCZC AX02 QST de W1AW Special Bulletin 2 ARLX002 From ARRL Headquarters Newington CT January 17, 2008 To all radio amateurs
SB SPCL ARL ARLX002 ARLX002 Lunar Echo Experiment looking for Amateur Radio Participants
The HF Active Auroral Research Program (HAARP) in Alaska and the Long Wavelength Array (LWA) in New Mexico are planning an additional lunar echo experiment for January 18-19.
Interested radio amateurs are invited to participate in this experiment by listening for the lunar echoes and submitting reports.
On January 19, listen on 6.7925 MHz from 0500-0600z, and on 7.4075 MHz from 0600-0700z. On January 20, listen on 6.7925 MHz from 0630-0730z and on 7.4075 MHz from 0730-0830z (depending on frequency occupancy at the time of operation, it may be necessary to adjust the frequency slightly).
Based on previous experiments, investigators believe it should be possible to hear the lunar echoes with a standard communications receiver and a simple 40 meter dipole antenna. The format for the transmissions will follow a five second cycle beginning on the hour and repeating continuously.
The HAARP transmitter will transmit for the first two seconds. The next three seconds will be quiet to listen for the lunar echo. Then HAARP will transmit again for two seconds, repeating the cycle for one hour. In the second hour, this five second repetitive cycle will be repeated at a different frequency. All transmissions from HAARP will be CW (no modulation).
Depending on ionospheric conditions, it may or may not be possible to hear the HAARP transmission directly via skywave propagation. Since HAARP will not be using any modulation, set your receiver on to CW mode to hear HAARP and the lunar echo. Investigators are interested in receiving signal reports from radio amateurs who may be able to detect -- or not detect-- the lunar echo or the transmitted skywave pulse from HAARP.
Submit reports via e-mail to mbreport@haarp.alaska.edu and list your call sign and the type and location of your receiving equipment and antennas. NNNN /EX
They were trying to get amateur radio operators to use their own gear and report if they heard the signal. I don't have equipment for those frequencies yet.
Originally posted by Heironymous: Do you think there is a recording some where for it? Would love to hear what it sounds like.
Do you know at what sort of frequencies it outputs at?
The base frequencies are in Hal's original post. The frequency of the product (what you actually hear) is very much dependent on the beat frequency oscillator (BFO) of whatever receiver you use. The direct signal should be an audio signal of relatively constant frequency, and the reflected signal might be slightly higher or lower due to doppler effect.
HAARP Home Page says they received over 550 first day responses from their call for listeners. No sample audio but there is a graphic representation visible in here.
The pictures are wild and there are some serious antennas up there.
