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Well, I'll be... KTRB is ND at night

The blame all falls on Pappas in the first place. Anyone that builds a site based on 12 hours a day on generator power should have there heads examined.
 
KTRB's night pattern has no augmentations. Hard to know what would have been permitted if the pattern had been augmented. The radiation minima at 21 degrees true (north-northeast) and 145 degrees true (southeast) are each 2.25 mV/m @ 1 km, the equivalent of 40 mW ND if my calculation is correct (which it may not be). I suspect that the FCC would allow KTRB to operate ND at night with a power considerably greater than 40 mW, but how much? I doubt that any co-channel or first-adjacent-channel station really requires protections that severe--or anything close to that severe. My guess is that the FCC would allow tens of watts at least.
 
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