Re: [IRCA] Update on WGN IBOC interference

["Brett Saylor" <bsaylor@xxxxxxxxx>]

They also hammered KDKA right here in Pennsylvania at that time of the
evening until they shut IBOC off @6pm,

Brett Saylor
Central PA


On 10/12/07, Neil Kazaross <neilkaz@xxxxxxxxxxxxx> wrote:
>
> WBZ IBOC was legally on until 5 PM CST the last couple of years and
> hammered
> KDKA here in IL from about 3:30 PM(earlier in Dec) CST to 5 PM (IBOC shut
> off) during Nov to early Feb.
>
> 73 KAZ home from travelling and sending you the DXE phaser tomorrow
>
> ----- Original Message -----
> From: "Craig Healy" <bubba@xxxxxxxxxxxxxxxxxxxx>
> To: "Mailing list for the International Radio Club of America"
> <irca@xxxxxxxxxxxxxxxx>
> Sent: Friday, October 12, 2007 12:55 AM
> Subject: Re: [IRCA] Update on WGN IBOC interference
>
>
> >I would like to add something to my previous post..
> >
> > In many cases, skywave interference near sunrise and sunset has been
> > regulated.  This is called Critical Hours power.  Often it'a rather
> small
> > fraction of the mid-day power.  1800w down to 1kw, or 10kw down to 2.5kw
> > as
> > a couple of examples that come to mind.  IBOC carriers should also have
> to
> > follow this guideline.  When an allocation study requires it, full IBOC
> > power should not be allowed until two hours after sunrise, and lowered
> two
> > hours before sunset.  The lower of the two powers, depending on the
> > allocation, should be the limit for both sidebands.
> >
> > All this is just more evidence as to why AM IBOC should never have been
> > permitted, and why it will cause irreparable harm if allowed to
> continue.
> > Were I KDKA or WYSL, I would not be looking forward to December when the
> > WBZ
> > IBOC will come barreling in during their drive times.  It will certainly
> > have an effect on their listenership and their bottom line.  Sad..
> >
> > Craig Healy
> > Providence, RI
> >
> >
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