[Elecraft] K3 -AM Broadcast on 1800 Khz?

[Paul Christensen]

> After hearing it for several days, I called the FCC watch desk in DC. The 
> response I received was that since the harmonic was only in an amateur 
> radio band no action would be taken.

As I recall,  harmonic energy in Part 73 AM broadcast services still falls 
under the general emission limitations under Section 73.44(b):

"Emissions removed by more than 75 kHz must be attenuated at least 43 + 10 
Log (Power in watts) or 80 dB below the
unmodulated carrier level, whichever is the lesser attenuation, except for 
transmitters having power less than 158 watts, where the attenuation must be 
at least 65 dB below carrier level."

Interference to the reception of other services is addressed in Section 
73.44(c):

"Should harmful interference be caused to the reception of other broadcast 
or non-broadcast stations by out of band emissions, the licensee may be 
directed to achieve a greater degree of attentuation than specified in 
paragraphs (a) and (b) of this section."

So, in the event the FCC was to dismiss a future complaint, I would bring 
these sections to their attention.  The first step in resolving these 
matters is to be prepared with knowledge of the rules and work directly with 
the station before getting the Commission involved.   In some cases, 
second-harmonic notch filters may be required in addition to the AM 
transmitter's existing LP network.

Paul, W9AC