[BC] Break Down Of Clear Channels

[PeterH5322]

>U.S. Class I-A Clears are: 640, 650, 660, 670, 700, 720,

>750, 760, 770, 780, 820, 830, 840, 870, 880, 890, 1020, 1030,

>1040, 1100, 1120, 1160, 1180, 1200 and 1210, since 1941.

That is my list, as confirmed from examining the NARBA treaty documents [ 
* ] , from a previous post to this List.

I call these "Class I-A Clears in-fact". There are 25 in number.


Additional United States Class I-A clears, which I call "de-facto Class 
I-A Clears", as these were once Clear, but were broken down by a variety 
of means, including State Department actions, actions by the owners, 
actions by the FCC prompted by political pressure from highly-placed 
parties, etcetera.

De-facto Class I-A Clears once included at least: 680, 710, 810, 850, 
1000, 1050, 1170, 1190, and possibly others.

Notice that all of these are within, or are immediately adjacent to, a 
group of Class I-A Clears in-fact, which were assigned solely to the 
United States [ ** ] .

Those clears which are presently on 1500 through 1530, but were formerly 
on 1460 through 1490, were not Class I-A Clears, de-facto, or in-fact, as 
these were not Clears at all, but were so-called "high-powered 
Regionals", and on account of their very high frequencies these stations 
were allowed the 10 kW power which was otherwise reserved for a Clear, 
whereas conventionally-powered Regionals were otherwise limited to 5 kW.

Subsequent to 1941, these "high-powered Regionals" were converted to 
Class I-B Clears, and additional Clears and Regionals were added above 
1530, with 1540 becoming a Class I-A Clear (Bahamas), 1550 becoming a 
Class I-B Clear (Canada and Mexico), 1560 becoming a Class I-A Clear 
(Cuba, but this was abrogated after Castro's rise, and was taken by the 
United States as Class I-B Clears), 1570 becoming a Class I-A Clear 
(Mexico), and 1580 becoming a Class I-A Clear (Canada), while 1590 and 
1600 became conventionally-powered Regionals.

[ * ] Incidentally, that document specifies the then-current efficiency 
of each subject station's radiator, presumably for grandfathering 
purposes.

[ ** ] That is, before the new Canadian and Mexican Class I-A Clears were 
forced into the BCB, at 740, 800, 860, 900, 990, 1010, 1050, 1220 and 
various other frequencies, thereby displacing other stations by +10, +20, 
+30, +40, or -10 kHz.