David Eduardo wrote:
Kludge writes:

My experience is entirely in rural areas where most of the issue is QRM
from power lines and other local sources, but where adjacent-channel
interference in the daytime is nonexistent. Where does the high noise
level in LA come from?

Computers, traffic light controllers, leaky power lines, ignitions,
diathermy equipment, dimmers, fluorescent lights, motors, etc., etc. It
takes at least a 15 mv/m signal to overcome it consistently in LA.

Wow. That's horrifying to even imagine... but that noise is mostly QRM
rather than adjacent channel trash?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."