[ARC5] NDB useful range ?

[William Cromwell]

Hi,

I use my RAK-8 and a R-23 to listen down there. Those archaic tube 
radios so it may not occur to everybody to use some audio filtering 
(solid state stuff!) and DSP. You can pull those signals right up out of 
the noise. Give your receivers a run.

73,

Bill  KU8H

On 2/20/21 1:48 PM, Doran Platt wrote:
>> 2nd try. 
> While assigned to the weather station on Swan Island in the mid-70's, 
> we had an HH (high altitude/high power) NDB on 407 kHz running a bit 
> over a KW. Ident was SWA.  I got QSLs from all over N and S America 
> and a few from Europe.  SWA was the midway of the western Caribbean, 
> so there was some pressure to keep it going.  Actually, we only had 
> one failure... the day I first arrived!  I don't hear too many around 
> the DC area as many have been decommissioned.  With GPS being 
> available, some of the local airports that used to have privately 
> maintained units are gone.  Having some experience in both remote (few 
> Navaids) and over-water operations, the ADF was always a back-up and a 
> confidence provider.  Of course, in summertime conditions, a cluster 
> of T-storms can mess things up from a long distance.  But, course 
> averaging does work, even with the QRN.  My last airplane has a Bendix 
> ADF-T12C that was as reliable as they come.  But, in the past 4-6 
> years, we depended on it less and less. I have had little success in 
> SWLing beacons at this QTH owing to noise.  I do have a spare T12C, 
> with everything, and I might at least try the receiver and maybe even 
> the loop antenna?
>
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