I've heard this argument many times, Dave, but whilst it was probably true 10 
or more years ago, surely all decent modern transceivers have a dedicated data 
mode that allows the use of narrow filters? Heck, even the humble FT-817 has 
one.

Julian, G4ILO

--- In digitalradio@yahoogroups.com, "Dave AA6YQ" <aa...@...> wrote:
>
> The advantage of using FSK is that one can take advantage of the excellent
> RTTY filters built into some transceivers. These filters are generally not
> available when operating in USB/LSB. This is particularly important to
> contesters operating in a crowded environment and DXers dealing with weak
> signals.


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