FMSteve said:Yeah, because in Canada they have different radios than down here in the US.(Sorry, I couldn't help but offer up a little sarcasm).
Heck, we have magic radios here in the U.S. which can reject interference from a station 400KHz away if it's carrying an Idaho station via satellite, but can't reject it if the station pots down the satellite & pots up a locally-produced program... but that's a completely different subject...
Thanks for bringing up the I.F. problem (harmonics), I forgot about that. Down here, for a Class C to Class C, the I.F. separation is 48 km (30m) between xmit sites, according to CFR 47 73.207 table A.
To nit-pick, harmonics are something else. A "harmonic" is a spurious signal, usually generated at the transmitter, on a multiple of the station's assigned frequency. KMCQ's 2nd harmonic would be 104.5*2 = 209MHz. (which happens to fall inside TV channel 12) The 3rd harmonic would be 104.5*3 = 313.5MHz, etc., etc...