SonoSational18 said:
.... and the subject of clear channels and directionals, both WBZ and WWL are directional by choice. Both are located near large bodies of water and chose to push more signal over land areas. There are a couple of other channels populated by non-directional 50kw stations, but with a lot of other directional stations in other area of the country. Among them: 680 with KNBR running non-D, 810 (WGY), 850 (KOA), and 1070 (KNX). These days you can put a 50kw signal on what were formerly considered regional channels, but there were traditionally channels like 710 where you had several big 50kw signals (but generally directional to some degree) and then some smaller signals in between. Others included 940, 1000, 1010, 1050, 1060, 1080, 1090, 1110, 1130, 1140, 1170, 1190, 1500, 1510m 1520, 1530, 1540, and 1560.
In addtion to the 25 1-A clears I listed, we have these addtional clear channels.
540. 680,690, 710, 730, 740, 800, 810, 850, 860, 900, 940, 990, 1000, 1010, 1950, 1060, 1070, 1080, 1090, 1110, 1130, 1140, 1170, 1190, 1220, 1500-1580.
Some, like 540 are joint Canadian and Mexican clears. One, 1540, is a Bahamian clear. In general, they allow for several dominant stations, such as Seattle and Chicago on 1000, with a number of secondary stations (1000 had Bridgedwater and still has Mexico City plus some "small fry" like KTOK). But all of those listed are clear channels.
Stations that recently got 50 kw on regional channels (550-630, 790, 910-930, 950-980, 1150, 1250-1330, 1350-1390, 1410-1440, 1460-1480) are not clear channel stations, just regionals with higher power.