"Jose" wrote in message
. net...
Can you explain me please how this(meaning increase of channels by
reducing their width) will increase the number of available frequencies
for the increasing number of VOR stations.

It means you can put channels in between existing channels. If done
right, there is no interference. It requires that existing transmitters
be modified (if they are not already "narrow" enough) so that there in
fact is no interference.

And that the receivers also be updated to ensure that they can select within
the narrow enough frequency range (and of course, be tuned to the
intermediate frequencies as well).

Pete