[Lowfer] A question about NDBs

[Steve Ratzlaff]

Hi Dave,
The Canadians use the 400 Hz offset; almost all USA beacons are still +/- 
1020 Hz. As such, an aircraft radio works the same no matter what the offset 
is; just a slightly different pitch that the pilot hears for Canada vs. US.
The radios still use AM mode to receive the NDB's.
73,
Steve
----- Original Message ----- 
From: "Dave Maples" <dsmaples at comcast.net>
To: <lowfer at mailman.qth.net>
Sent: Monday, December 03, 2007 7:14 PM
Subject: [Lowfer] A question about NDBs


> All: Time for some very ignorant questions:
>
> In the long ago, I used to listen to NDBs on an old BC-348 receiver.  All
> the NDBs used ~1000-Hz MCW on an AM carrier.  Recently I have begun tuning
> through LW again, and now I find both the MCW beacons and other beacons 
> that
> ID in straight CW, and then hold a carrier for a bit, then repeat.
>
> 1. Since both types of NDBs seem to be aeronautical, I'm puzzled as to how
> many ADF installations can deal with the non-MCW beacons.  Do they now
> contain BFOs?
>
> 2. When did this type of beacon start deploying?
>
> Thanks,
> Dave WB4FUR
>
>
> _______________________________________________
>>From the Lowfer mailing list
> Send messages to: Lowfer at mailman.qth.net
> To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer