On Jan 21, 9:51 am, Arne wrote:
On Sun, 20 Jan 2008 19:35:37 GMT, (Mark Zenier)
wrote:

On the first transmission, (Jan 19, 05:00 UTC), I tried using an
oscilloscope to see if I could see the echo. It was a 4 second cycle
with 2 seconds on and 2 off. (Which made syncing the scope (with a 5
second sweep) a real pain. The next pulse was going when the first one
ended, triggering it again).
Anyway, with the narrowest (2 kHz) bandwidth on my old R-1000, it
just didn't cut it. When the outgoing signal was S9+10 (in Seattle)
I thought I might have heard an echo or two, but just couldn't be
sure.
What bandwidth were you successful listeners using?

2 kHz in USB mode on a NRD-535D tuned to 6792.0 kHz and 7407.0 kHz.
The cycle (per the HAARP website) was 5 seconds. 2 seconds on,
followed by 3 seconds off.

Arne (AzUSA)

It seems those that heard the reflected signal were in the south.

I used a crystal CW filter. 250hz BW. My recollection is that is at
-6dB, not -3dB.