Greg and Joan wrote:
1) Didn't PJB, 800 khz, Netherlands Antilles (Bonaire) run 500Kw? Do
they still do so today? I used to be able to pick them up in Massachusetts

Yes and no.

(the night before my brother's wedding in Traverse City, Michigan PJB
was BOMBING into my motel room. I mean, they were louder than the
Chicago clears less than 200 miles away. Things must have been auroral
that night.)

My understanding is PJB's power plant (they had their own...) burned
down. When they rebuilt they decided to settle for 100kw and a
directional antenna favoring northern South America. (Venezuela &
Colombia)

beamed out toward the ocean and their signals don't go west. Even WBZ has
a lobe dampened, IIRC, to protect a station in Wyoming.

My understanding is that WBZ's DA actually protects the *east* - they're
trying to avoid wasting power over the ocean where there's nobody (at
least nobody with a diary) listening. The Wyoming station (KTWO Casper)
protects WBZ, but not vice-versa.
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com