Re: [IRCA] "Decoding" AM Authorizations

[Dennis Gibson]

You've got the right idea. The first number is day power and the second is 
night power. ND is nondirectional. DA-1 is the same pattern day and night. DA-2 
is different patterns day and night. DA-3 is different patterns day, night and 
critical hours. The most common directional is DA-2.

Sent from my iPhone

> On Mar 3, 2016, at 5:08 PM, Les Rayburn  wrote:
> 
> Forgive me fellow DX’ers, for I have sinned. Despite AM DXing for several 
> years now, I confess that I’ve never quite learned how to decipher the FCC 
> database’s designations for AM authorizations. 
> 
> For instance, tonight i’m listening to 1550 AM a lot. I notice that WAZX 1550 
> in Smyrna, GA is authorized to run 5w/16w DA-2B. Now I know this vaguely 
> means that they can run 50,000 watts in the daytime, but only 16 watts at 
> night. But I have no real idea what “DA-2 B” refers to. 
> 
> Meanwhile, KCOM 1550 in Comanche, TX is authorized to run 250w/54w ND D. Say 
> what? I’ll take a stab that means 250 watts in the daytime, and 54 watts at 
> night. Non-directional? 
> 
> I know this stuff is important. But I’ve been using the hunt and peck method 
> of DXing for years. Not targeting stations as I’m doing now, so it’s becoming 
> more important. 
> 
> Is there a “FCC Lingo for Dummies” guide on the web somewhere? Can someone 
> post some Cliff Notes? 
> 
> 
> 
> 
> 
> 73,
> 
> Les Rayburn, N1LF
> 121 Mayfair Park
> Maylene, AL 
> EM63nf
> 
> Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA. 
> 
> Elad FDM-S2 SDR, AirSpy SDR, Quantum Phaser, Wellbrook ALA1530 Loop, 
> Wellbrook Flag, Clifton Labs Active Whip. 
> 
> 
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[IRCA] "Decoding" AM Authorizations

[Les Rayburn]

Forgive me fellow DX’ers, for I have sinned. Despite AM DXing for several years 
now, I confess that I’ve never quite learned how to decipher the FCC database’s 
designations for AM authorizations. 

For instance, tonight i’m listening to 1550 AM a lot. I notice that WAZX 1550 
in Smyrna, GA is authorized to run 5w/16w DA-2B. Now I know this vaguely 
means that they can run 50,000 watts in the daytime, but only 16 watts at 
night. But I have no real idea what “DA-2 B” refers to. 

Meanwhile, KCOM 1550 in Comanche, TX is authorized to run 250w/54w ND D. Say 
what? I’ll take a stab that means 250 watts in the daytime, and 54 watts at 
night. Non-directional? 

I know this stuff is important. But I’ve been using the hunt and peck method of 
DXing for years. Not targeting stations as I’m doing now, so it’s becoming more 
important. 

Is there a “FCC Lingo for Dummies” guide on the web somewhere? Can someone post 
some Cliff Notes? 





73,

Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL 
EM63nf

Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA. 

Elad FDM-S2 SDR, AirSpy SDR, Quantum Phaser, Wellbrook ALA1530 Loop, Wellbrook 
Flag, Clifton Labs Active Whip. 


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