Only a guess, Sean. Is the vertical radiation pattern of the antenna designed to 
  give minimal field strength at ground level? 
   
  John Fletcher

Sean Breheny <shb7@cornell.edu> wrote:
  Hi all,

Those who live in the Boston area may have particular insight on this one.

I noticed a while back that I can hear two NDBs (Nondirectional
Beacons) on my Icom IC-R20 receiver with the supplied short whip
antenna. Both are very faint. One of them has the identifier LQ and
seems to be the Lindy NDB near Lynn, MA. The other has the ID SKR, is
on 251kHz, and seems to be the Shaker Hill NDB. I used Google maps and
airnav.com to locate both of these. I was surprised to find that the
stated lat/lon for SKR placed it only about 3 miles from where I live.

So, I drove over to the transmitter site and I got as close as the
gate to the property (which houses quite the antenna farm - probably
an FM station and several other things besides the NDB). Yet, the
signal was still only barely audible.

So, I'm puzzled. Any idea why getting about 100 times closer to the
antenna would result in no improvement in signal strength??! It seems
as though maybe its location was moved - but that would be strange
given that its location is very important (it IS a nav beacon!)

Any ideas?

Thanks,

Sean
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