[Elecraft] K3 5 pole vs 8 pole filters - attenuation in the passband

[Richard Ferch]

My solution for this is to configure the K3 to switch the 250 Hz roofing 
filter in at 350 Hz. A DSP filter of 250 Hz is a bit narrow, but with a 
350 Hz DSP setting and the 250 Hz roofing filter, I still get good copy.

That being said, most of the time I operate RTTY with a 500 Hz roofing 
filter and the DSP filter at 400-450 Hz; I only use the 350 Hz setting 
when there is a strong signal shoulder-to-shoulder with the one I am 
trying to copy.

73,
Rich VE3KI

WK6I wrote:

> For RTTY the sweet spot is 400. At 250 you might lose information your
> decoders need to work. 73 jeff wk6i