Paul, It may help on PSK-31. Olivia can use a bandwidth wider than the filter. MT-63 and other modes can also. For this reason, I would look at how much I used the narrow bandwidth modes and make your decision accordingly. To slow Olivia down to 250Hz BW needs to be considered in terms of duty cycle and speed of delivery. Just some thoughts to consider, David KD4NUE
-----Original Message----- From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of deadgoose38 Sent: Thursday, December 18, 2008 10:20 AM To: digitalradio@yahoogroups.com Subject: [digitalradio] Filter question I have a "stock" Yaesu FT-817ND that I am using with great results on 40 meters with PSK-31 and Olivia 16/500. I wonder if adding the 500 Hz CW filter would be useful? Any experiences along this line?? /paul W3FIS
