MF,
Am 28.02.2012 01:02, schrieb James Moritz:
[...] if someone navigating an aircraft sets their ADF receiver to a
particular beacon frequency and hears an assortment of
amateur-generated morse code mixed up with the beacon ID, this is
likely to cause confusion or error. So there is a strong argument for
amateurs not to use morse code at all in this frequency range. It
would be better to use totally different types of transmission that
would not be confused with a NDB beacon signal.
Now, if there are so many NDBs in that small spectrum, it may be
difficult for us to find a free frequency at all. Also it will be
difficult to define a useful bandplan and we have to add the NDBs into a
graphic bandplan if that will really be a problem.
Will we really cause interferences with NDBs if we actually run 1W or 5W
EIRP? If so, it will surely happen that a radio amateur causes problems
for the NDB users. But, if the NDB density is really so high, then it
wouldn't be a problem for the user just to choose another NDB for
natigation!? Sooner or later the NDB navigators will be nerved and will
QSY (not the NDBs itselfe). That little range of 7 kHz, for me it is
unlikely that there is no alternative for them. Also i think these few
NDB users will not cause trouble for us, by complaining to the
authorities. Otherwise we will see.
I think we just should wait for the local allocation and then do our
work on the band and see what happens.
73, Stefan/DK7FC
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