[Yaesu] FT-990 filters

[Kjell W. Strom]

Mike,

In the CW 500 position the signal is passed through the 500 Hz in the 2nd IF
(10.9 Mhz) and the  2400 Hz SSB filter in the 3rd IF (455 MHz).

In CW 250 the same 500  Hz  filter is used in the 2nd IF, followed by a 250
Hz filter (if  installed) in the 3rd IF or any filter  you  ma install
there.

By the way, you may have  noticed that you can use any  of the installed
filters (except the 10 kHz AM filter) in any mode.  I am, for example, using
USB 500 Hz  for Amtor  and  Pactor and USB 250 Hz for PSK31 when the going
gets rough. The  narrow filters are then centered around a 1500 Hz tone.

73,
"Kel", PB3SM - SM6CPI