[BC] Class D's

[Mark Humphrey]

It is indeed interesting to note the variation in ERP of these Class D
stations.  As Scott mentions, some in Alaska are 100 watts, WVAC in
Adrian, MI is up to 87 watts, but WPEB 88.1 in West Philly was
ratcheted down to 1 watt over the years, due to TV 6 interference
constraints.

The original Class D rule limited TPO to 10 watts, but permitted as
much antenna gain and HAAT as the applicant could afford (if no other
stations received interference), so when we built our high school
station, we built a 4-bay horizontal ring antenna.  However,  the FCC
now allows the grandfathered Class Ds to run higher TPO as long as the
60 dBu "class contour" doesn't exceed a radius of 5.4 km.  That's the
breakpoint between Class D and a minimum Class A.

Mark

On Fri, Dec 2, 2011 at 11:06 AM, Thomas G. Osenkowsky
<tosenkowsky at prodigy.net> wrote:
> In my area, WFCS, New Britain, CT. WQAQ, Hamden, CT. WERB, Berlin, CT. WOSS,
> Ossining, NY. You could go to fcc.gov use FM Query and just specify "D" for
> Class and get a (large) listing of all Class D listings.
>
> Tom Osenkowsky, CPBE
>
>>Does anyone have, at hand, a quick count of how many 10 W Class D's (or
>>anything under 15 W) still exist?