Roland Stiner wrote:
I live 2 miles away from WOR 710's transmitter site in NJ. I am receiving
them loudly on thier 5th harmonic on 3.550 MHz. My question is: by how
much does an am broadcaster have to surpress thier hormonics?

47CFR73.44:
"... Emissions removed by more than 75 kHz (from the station's carrier)
must be attenuated by at least 43 + 10 Log (Power in watts) or 80 dB
below the unmodulated carrier level, whichever is the lesser
attenuation,..." (followed by an exemption for powers of less than 158
watts)

In WOR's case the formula would yield an attenuation of 90 dB so the
80dB figure would apply.

Are you certain the harmonic isn't being generated locally? (possibly
even in your receiver)
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com