I know, I know - "RFI *on* an HF rig" & not "RFI
*from* an HF rig"?

Thats it. In trying to match the capabilities of a friend's
HF performance (rx only), I built what seemed to be a
better radio (K2). His rig is no lamer, either - its
a Yaesu FT-920. I can now equal him on signals heard.
We live close enough and have similar antennas so according
to the numbers, I should be able to copy signals he has
trouble copying more often than not.

Still, I rarely hear better than him. We are usually just
equal. According to the specs, I should hear a bit better
and I'm not.

I went over to his place and listened - his noise floor was
lower by 2 S units. He dosen't own a computer and I do
so I figured it was my PC. Came home and shut it down
with maybe 1/2 a S unit drop in my noise floor. Even un-
plugged the power strip going to the PC.

Then it came to me - I live closer to the city and am on
a hill while he lives in a depression. He had noticed another
ham who has much more trouble hearing and we both realised
that the other ham lives much closer to downtown than we do.

Could my noise floor problem be due to the fact that I have
a line of sight path to downtown 3 miles away? My friend
is 2 miles out farther and like I said, in a depression that puts
him 50 feet below downtown's grade. I'm 50' above downtown.

What can I do to lower the RFI from downtown? I've fought
intermod before but on VHF/UHF and that was a long time
ago.

I have very little experience with RFI from a city on HF .

Moving is out.

Help? Ideas? I'm not looking for much - I figure if I lower my
noise floor 3 db I will have gotten 98% of the noise. I have a
RX only port on the K2 and have a 10m inverted V hooked
up there but that just kills the whole spectrum except 10m.

BTW the main band of concern here is 40m. Maybe I could
build a BPF? Anyone know where I could find plans for one?

--
Just my 2¢... 73 es gd dx de Ken KGØWX
Grid EM17ip, Flying Pigs #-1055
Proud builder & owner of Elecraft K2 #4913