WNVR question

[JeremyAndrews]

I noticed they have night operation (120 Watts) from their McHenry County transmitter. My question is how do they get around operating at night and not covering their city of licence?

Its licenced to Vernon Hills (Southern Lake County) but has no signal there at night from what I have heard while there and in Libertyville.

Here's their night coverage pattern.

http://www.radio-locator.com/cgi-bin/pat?call=WNVR&service=AM&status=L&hours=N

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[Ed_Walker]

> I noticed they have night operation (120 Watts) from their
> McHenry County transmitter. My question is how do they get
> around operating at night and not covering their city of
> licence?
>

According the text in their 2002 night application, on display at
the FCC website "the proposed class-D nighttime facility is exempt from
the community coverage rules".

 

[dave73]

> > I noticed they have night operation (120 Watts) from their
>
> > McHenry County transmitter. My question is how do they get
>
> > around operating at night and not covering their city of
> > licence?
> >
>
> According the text in their 2002 night application, on
> display at
> the FCC website "the proposed class-D nighttime facility is
> exempt from
> the community coverage rules".
>
WKTA also doesn't cover their COL at night. They're licensed to Evanston, but mainly cover Northbrook (where the towers are, but is ND at night) and Wheeling.

 

[w9wi]

> I noticed they have night operation (120 Watts) from their
> McHenry County transmitter. My question is how do they get
> around operating at night and not covering their city of
> licence?

An AM station with night power of less than 250 watts *and field strength of less than 141mV/m at 1km is classified as a Class D station. (FCC reg 73.21(a)(3))

An AM station outside the expanded band is required to cover 80% of the city-of-license with a 5mV/m or interference-free signal at night. However, Class D stations are specifically exempted from this rule. (FCC reg 73.24(i), note the last sentence)

* the vast majority of stations with less than 250w have a field strength of less than 141mV/m. In a few cases extraordinarily efficient antennas are in use (usually when an existing AM tower is made taller to accomodate an FM station) which deliver more than 141mV/m for less than 250w. WKKD in Aurora, for example.