[Elecraft] P3 as a portable RFI bandscope?

[Jim Miller]

I've pulled my P3 out of my setup to try and go searching for sources of
160/80m RFI.

I did a whole house shutdown today and made sure that anything which had a
battery was also shut down. That included the fire/burglar alarm system.
For the purposes of these two bands my house is "clean."

So now I need to do a walk around the area to see if I can locate the
sources.

I tried a little DC to daylight receiver with little success even with a
1ft diameter 2 turn loop for an antenna. The signals in question are too
narrow band and the receiver is too insensitive so the signals are buried
in noise.

I'm now trying to use the P3 in hopes that its signal processing and
averaging and ability to see a broader spectrum might be easier to use than
listening to a single frequency.

I tried the loop antenna directly into the P3 while powered on a battery
and it seems like I could use a bit of gain to get over the input noise of
the P3.

Have others tried this and if so what sort of preamp, antenna or other
setup was used?

Right now focused on 160 and 80m.

73

jim ab3cv