Re: BUR-GBH

[dan.strassberg@att.net]

21 kW at 323m AAT is substantially more than the 
equivalent of 50 kW at 150m (grandfathered for many 
Class Bs to 50 kW at 500', AKA 152.4m). A rough rule of 
thumb for calculating the ERP at the class-maximum HAAT 
is to multiply the ERP by the square of the ratio of the 
HAAT to the class-maximum HAAT. Squaring 323/150, yields 
4.637. 4.637*21=97.4 kW. Thus, WGBH-FM is apparently 
being grandfathered to its current ERP at 150m. That's 
essentially twice the maximum power for Class Bs. That 
would make the station what?--A C1? The current HAAT is 
around 650', so the move will, in effect, cut the 
station's power by about half, making it effectively 
about twice as powerful as the market's most powerful 
commercial FMs but only about half as powerful as it 
used to be.
--
dan.strassberg@att.net
617-558-4205
eFax 707-215-6367

> Because WGBH is raising it's HAAT from 198m to 323m, and they're moving 
> location a good distance north and west, they're only going to run 21KW, 
> down from their 97KW. 
> 
> Not unusual - 97KW was a grandfathered amount of power anyway for this
> license class - any major modification would have required conformity to
> current limits. In this case, since they're currently licensed as a class
> B, they couldn't remain above 50KW with this significant change in
> facilities.
> 
> -Peter Murray (N3IXY)
> Pittsburgh, PA
> 
> 
> On Thu, 6 Jun 2002, Ron Bello wrote:
> 
> > 
> > Does WGBH get to keep it's higher power while moving to  the WBZ-TV tower ?
> > 
> > 
> > >Anybody know when 'GBH-FM will move to the WBZ-TV tower?
> > >--
> > >dan.strassberg@att.net
> > >617-558-4205
> > >eFax 707-215-6367
> > >
> > 
> > 
> > 
>