[FedCom] RE: NTSB

Tue, 23 Apr 2002 09:16:51 -0700

>From: "Rankin, Robert L" <[email protected]>
>Reply-To: [email protected]
>To: "'[email protected]'" <[email protected]>
>Subject: [FedCom] RE:  NTSB
>Date: Mon, 22 Apr 2002 14:14:00 -0500
>
>
>What PL tone do these use?  Most FAA is 136.5.  Are these the same? It 
>would
>be handy to be able to keep my receiver quiet the rest of the time.
>
>Bob
>
> >I show the 166.175 to generally repeat 165.3375;  also show this freq. in
>the repeat mode to be either Chan. 3 or Chan. 11. I also show 408.8250 to 
>be
>used as accident investigation, here in the Southern Region. I also show
>165.7500 as Chan. 1 NTSB and 165.7625 as Chan. 2 NTSB. The 166.1750 as 
>Chan.
>3 NTSB.
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In Southern Cal., due to the large number of sites, they use all freqs,
172.825-172.975, and all 3 PL's (136.5, 146.2, and 156.7). I've also picked 
up encryption on 169.350, which is the local input to 172.950.
I wasn't fast enough to put in the repeater and see if it was coming out, or 
if someone else was on 169.350 coded. Has anyone else heard digital 
encryption on FAA channels, or know if they're using the regular security 
freq at airports?  Ruff

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