Re: [IRCA] [NRC-AM] IBOC on late on 1190 obliterating WHAM

["Powell E. Way III W4OPW" <w4opw@xxxxxxxxx>]

--- David Gleason <david@xxxxxxxxxxxxxxxx> wrote:

> There are two issues here.
> 
> First, the owners of most of the big, former 1-A,
> clear channels are the
> biggest supporters of HD Radio. They have looked at
> where the revenue comes
> from, and it does not come from skywave. It does not
> come from coverage of
> areas outside the metro area the station is in. So
> they are, in effect,
> saying, "we only care about metro groundwave
> coverage and HD is fine for
> this."


That's what they've been told. It's likely only partly
true for the daytime. At night, some of the 1A's will
lose at LEAST half of the groundwave coverage, maybe
more. I don't expect WLAC will have very good night
coverage at ALL with IBOC. I expect they will lose
WELL more than  half or even more of the coverage? Why
? WCKY on 1530 does a TERRIBLE number on the INSIDE
THE NASHVILLE CITY LIMITS when they ran IBOC until
sunset Bakersfield. That was when they were WSAI. And
with lots of stations running IBOC at night, decoding
will become a real NIGHTmare. 




> Second, the HD sidebands may affect stations that
> are very tightly spaced,
> or are "shoehorn" grants that have agreed to accept
> huge interference at
> night in exchage for being able to operate. 


And in some directions, some of these stations will
lose most of their night coverage....period aka WBT in
Charlotte. 

 
> In addition, remember that neither AM nor FM have
> anywhere near the
> listening at night that they do in daytime. Night
> listening is less than a
> third of the morning listening, and most is in the 7
> to 9 PM frame. Stations
> have a hard time selling night listening, no matter
> what kind of share they
> have as advertisers do not generally specify nights
> in ad buys. 



So? That means you can make night listening untenable
for everyone not in direct sight of the tower, and
some of those folks won't have reception also.


Powell





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