[BC] Class "D" AM Towers

[PeterH]

On Feb 14, 2010, at 11:38 AM, Mike McCarthy wrote:

> BTW...it's KYPA.

Yes, I know that. No need to nit-pick ... we:re professionals here.

> 1230 is a Class C channel and Class C's can't have a DA.

Well, the DA-1 application was approved by the FCC, and it is indeed  
going in, after failing to provide adequate service while using just  
one tower of KDAY:s six tower array.

Yeah, KDAY is now KBLA, but you probably knew that, too.

> This makes no sense.

It makes perfect sense.

The license is grandfathered at 241 mV/m/kW at 1 km, and the  
efficiency of KBLA:s towers on 1230 is something like 305 mV/m/kW at  
1 km.

So ...

A DA-1 was proposed, and accepted.

That this provided more than 241 over the COL downtown, and about 3  
kW, effective, over L.A.:s Koreatown District, fit perfectly within  
the licensee:s desires, and was certainly an improvement over less  
than 1 kW ND2 from KBLA.

The licensee:s representations to the commission included the unsafe  
site, which required armed guards every time a technician was sent  
down to the Odd Fellows Temple building for trouble-shooting. That  
site has since been dismantled, and is no longer available.

KGFJ ... er, KYPA ... is presently operating under an STA with 680  
watts ND, or 1 kW DA-1, whichever meets the protection requirements,  
until the DA-1 system is finally adjusted.

The issue at this point is not the KYPA phasor, but the KBLA phasor.

The Licensee has three days to complete the adjustments, as the  
present STA expires 2/17/2010.

I suspect a new STA will be requested, and will be granted.

So, whether it makes any sense to you, or not, this Class C station  
is indeed going DA-1 with a full kW, and not 680 watts ND2.