[Yaesu] FM Receive on FT-757GX

[Pres Waterman]

>
> Use of +/- 5 KHz deviation is allowable on those
> portions of the amateur bands above 29.0 MHz which
> allow phone type of operation.  Below 29.0, FM is
> still allowed, but, the deviation cannot exceed +/- 3
> KHz which gives a bandwidth the same as a "normal" AM
> signal.  This is often called NBFM (narrow band
> frequency modulation).  Although many rigs now operate
> below 29.0 MHz have FM as a mode, the vast majority of
> them are set up for +/- 5 KHz deviation and are thus
> illegal to use for FM below 29.0 MHz.  Also, the
> closest that you can actually operate to 29.0 MHz
> using +/- 5 KHz deviation is 29.005 MHz since the
> width of the signal is such that the modulation will
> take it down to 29.000 MHz.  In fact, as a practical
> matter, I would never operate using FM with +/- 5 KHz
> deviation below 29.010 MHz to allow for any additional
> modulation products that might be present.


This advice implies it is OK to run FM below 29.5 which it is NOT. That area
has a lot of satellite operation in it. They can not move.

Pres Waterman
traveling... much delay in catching messages,
sorry if I reply and others have already
and I lost many many emails in a crash also!