I don't use any filtering for it, I might narrow up the TS-570 with the high 
and low cut controls, but  it's in normal SSB so the full width is alright. 
If you have a newer radio, the dsp will be able to narrow it up if you 
really want to. Fun thing is, most hams I know don't know how to take 
advantage of the DSP settings, and high cut and low cut on the kenwoods like 
most of them have. They're very useful.
----- Original Message ----- 
From: "Eric Clegg" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, November 24, 2007 6:06 PM
Subject: psk31 and narrow filters


> Hi listers,
> When I finally get around to purchasing a rig will I have to equip it =
> with an ultra narrow filter such as 300 hz in order to work psk31? Or =
> will 500 hz be sufficient?
>
> Thanks for the help.
>
> Eric
> KU3I
>