That is the point! The "transmitting" device may not cause (is not
allowed to cause) interference even when it when it is operated fully
with in compliance to part 15. A number of companies are finding that
out the expensive way at present.

Roger, at one time I thought you had a grip on this radio and RF stuff. I'm
starting to believe not.



However the original post was not about the transmitter at all, but
him hearing aircraft radios through his system. That could be
intermod/front end overload, or images. As he's listening around 108
and aircraft are roughly 130 that gives a difference of 22 MHz which
shouldn't create an image problem unless one of the IFs runs in the 22
or 44 MHz range. So, I'd guess it's probably front end overload with
intermod.

Come on, buddy. The image is at TWICE the IF from the intended. With the
standard 10.7 MHz. IF of an FM radio, the image is at 21.4 MHz higher than
the intended frequency, exactly where we predicted the image would be. If
he's listening at 107. the image will be at 128.4, right where it was found.

Jim