[Milsurplus] ADF today

[Mark K3MSB]

Hi Bob

I'm well aware of what NDBs are used for -- I have an Instrument Rating.

I don't think there are any active NDB approaches any longer, but am not
sure.   Even if they were marked "Not for Navigation" as David suggest,  if
they were operational in any capacity in private hands and they caused an
accident,  you can guess the outcome.

In any event,  I would love to see some preserved if only for historical
purposes.    Keeping them maintained by private means as a backup has
problems of it's own.     Of course, putting all your eggs in the GPS
basket is not without problems.....

73 Mark K3MSB

On Fri, Apr 24, 2020 at 8:55 PM Robert Nickels <ranickel at comcast.net> wrote:

> On 4/24/2020 5:18 PM, Mark K3MSB wrote:
> > A group of hams operating a navigation aid for fun?   That would work
> > until the first aircraft crashes because the NDB calibration was only
> > to "Ham Standards".......
>
> Of course I wasn't suggesting they be maintained for navigation
> purposes, as that is why FAA is phasing them out and those approaches
> will no longer be legal after that happens.
>
> As I stated, amateurs could operate them for hobby/experimental purposes
> ranging from simple NDB DXing as we do today to more advanced digital
> modes.   For example, wspr beacons on 630 meters have been copied all
> over the globe using the present 5 watt EIRP power limit, so even the
> most common 25 watt NDB transmitters could be reduced in power and still
> have interesting potential.
>
> The options are to watch in silence as LF NDBs disappear or come up with
> an alternative that could be proposed to repurpose them. I've presented
> one.
>
> 73, Bob W9RAN
>
>
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