[FedCom] Re: 138.925

[gfdubois at juno.com]

Speaking of weird signals, I could use some help with one.

There has been a digital signal on 138.925 coming from the ANG base at
Portland International for decades now.
According to the IRAC database, it is a fixed station transmitting with
ten watts. I always assumed it had 
something to do with a/c navigation, but I don't think so. For one, we
have gone through three different aircraft in the
last 30 years, and it's still there. And we have a TOD generator, on
397.0. 
The "Special Notes" code is S361, which means "multiple transmitting
and/or receiving stations operating at fixed locations..."  But
everything the ANG owns is at Portland Arpt. (Or Klamath Falls, in
southern Oregon.) And the signal is always the same strength.

If you listen to it, it transmits at irregular intervals.
  http://mywebsite.mysite.com/files.html
(There's another one on 139.875 that's been there for the last ten years
or so. I have no idea what that one is either.)

Anyone have any ideas? 
(Not guesses. Any AF vets in the group?)

Thanks.

George DuBois