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

[Jim Brown]

On Sat,2/27/2016 9:33 AM, Richard Ferch wrote:
> 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. 

WK6I wins RTTY contests. I'd go with his advice that 400 Hz is right for 
RTTY. He's not the only one who thinks so. So do W0YK (another winning 
RTTY contester) and G3YYD, the author of 2Tone, an excellent RTTY 
decoder. Switch to narrower IF only when the QRM gets really bad.

And so do I.  FWIW, I was saying that before anyone. :)

73, Jim K9YC