In message
nsj wrote:

Remember that we have 5.5kHz audio bandwidth AM (if that) for domestic
transmissions -- not the wide bandwidth/stereo services you're used to in
North America.

Is it really as narrow as that now, Nick? The last large MF
transmitter I visited (a good many years ago, admittedly) had a
brick-wall filter at 6.3kHz, which was considered unusually low
at the time -- but the main objective was to be out by 9kHz, so
as to be clear of carriers on the adjacent channels. Perhaps some
of that still applies.

--
Richard L.