[BC] Real cases of IBOC interference wanted for research purposes

[Paul Smith W4KNX]

Since the null of an AM DA is only at the carrier frequency, all bets are
off when you go 20 or so khz either side.  There is a very good chance that
the IBOC power is far greater in the null than it supposed to be.  The 770
station in Pt. Charlott/Ft Myers Fl, is a good example for me.  I'm in the
null of the DA, and can barely detect an analog signal, but the IBOC either
side is quite noticable here in Sarasota.

Paul Smith
W4KNX
Sarasota, FL

-----Original Message-----
From: broadcast-bounces at radiolists.net
[mailto:broadcast-bounces at radiolists.net]On Behalf Of Kent Winrich
Sent: Wednesday, July 19, 2006 2:33 PM
To: Broadcasters' Mailing List
Subject: Re: [BC] Real cases of IBOC interference wanted for research
purposes


That would be real interesting if KXNT interferes with you, as KXNT has a
deep null your direction. and at about 370 miles that is a hike!

On 7/19/06, David L. Hershberger <dave at w9gr.com> wrote:
>
> Hi Doug,
>
> I have two AM cases to report. First, KXNT 840 in Las Vegas apparently
> sometimes "forgets" to turn off their IBOC at night. When this happens it
> is
> usually on weekends. This trashes our adjacent local 5 kW AM station at
> night (KCNO 830). Here are examples recorded two years ago:
>
> http://www.w9gr.com/knco.mp3  (normal reception, no IBOC)
>
> http://www.w9gr.com/kncoiboc.mp3  (IBOC on from Las Vegas)
>
> Details of antenna patterns, my receive location, etc. are in my comments
> on
> the FCC web page.
>
> The second case is daytime interference. KCBC 770  in Riverbank (Modesto)
> trashes KKOH 780 in Reno. My location is Nevada City, CA and I think I am
> well within KKOH's protected contour. I don't have a recording of KKOH but
> I
> could easily make one.
>Do you have a BDR? http://www.oldradio.com/bdr.htm