400Hz is my favorite CW/RTTY filter. I also have a 250Hz but if you read
the archives you will see that it is not much narrower than the 400. If
you are concerned about the cost this is worth looking at. I have the
2.1KHz and 1.8KHz SSB filters. Of course the 2.1 sounds better, I switch
in the 1.8 when QRM worsens. I think having both is useful.
John KK9A
WS1L wrote:
Right now I have the stock SSB and a 400 Hz filter in both main and sub
rcvrs. I would like to add some a few at a time. My first priority is to
add a couple to the main receiver, since it is the biggest chore to get
to.
I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
and 1.8 kHz filters. I know that narrowing the DSP to 1.8 gives a really
difficult to understand voice signal, while the 2.1 allows in more adjacent
signals. However, the roofing filters may not behave in the same manner.
For example, the 1.8 could be set to turn on at 2.1 to take advantage of
skirt shape.
I primarily DX, and operate in some contests as well. I know SSB contests
really need a narrow SSB filter.
Any suggestions on the matter from those who have gone this route before?
73 de Chuck, WS1L
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