David Woolley wrote:
HF broadcast stations use 5kHz channelling, which would only allow them
2.5kHz with brick wall filtering at both transmit and receive ends, although
they probably do expect to suffer significant adjacent channel interference.
Absolutely, and there is a lot of it -- which is why it's so cool to listen to
SWBC in SSB mode, one sideband or the other. Since in AM mode it is one
station's lower sideband interfering with another station's upper sideband (or
vice-versa), choosing the sideband being interfered with the least is a
terrific aid to listening.
Bill W5WVO
SWL since 1957 (age 10)
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