[BC] Nighttime IBOC hash gets local press

[PeterH5322]

>I'm told WOR is getting clobbered on Long Island. The Long Island 
>book comes from the same diaries that make up the metro survey. The 
>loss of Long Island diaries could drop them below a 2 share once 
>again. Unfortunately, they have no control over the interfering 
>station(s). At least WABC can eliminate one adjacent offender, since 
>they own them (WJR).

The BCB was laid out with 50 KHz same-market spacing. This was changed to 
40 KHz in 1941, and additional stations were thereby dropped into several 
markets, most particularly New York, but some others as well.

Alas, the Clears were laid out without respect to adjacent channel 
interference from or to distant markets, and the New York metro (then 
including Newark) had 660, 710, 770 and 880, while the Chicago metro had 
stations precisely 10 kHz higher than New York, 670, 720, 780 and 890, 
while other, closer metros were precisely 10 kHz lower, including 700 and 
760.

(650 and 870 are too far away to be of consequence, with respect to New 
York, while 680, 730 and 900 are either clear across the Nation, or are 
foreign Clears, with respect to Chicago).

The mutual destruction which is occurring now was predictable. If the New 
York stations mentioned were Class Bs, each would be protecting the 
primary service areas of Chicago, Cincinnati and Detroit during night 
time hours. Likewise, if the Chicago, Cincinnati and Detroit stations 
were Class Bs, each would be protecting the primary service areas of New 
York (and, then, Newark) during night time hours.

But, all are Class As, and although not mutually interfering by rule, as 
all are of the same class, and neither is superior in class to the 
other(s), that interference is, and has been going on for decades.

The presence of IBOC is merely exacerbating an interference process 
within the primary service areas of many Class As, only some of which 
have been mentioned, which has been going on for the better part of a 
century.

And, what with some anomalies, albeit predictable ones, such as 
exceptionally low ground conductivity on Long Island, is it any wonder 
that IBOC is compromising certain station's primary service?