[Elecraft] K3: roofing filter configuration settings

[john at kk9a.com]

This sounds like a great idea. I used Inrad 250Hz filters in my Yaesu
FT1000MP Mark-V and they worked great on RTTY but I found the 250Hz
setting to be too narrow on my K3S.  Is anyone doing this?

John KK9A

RLVZ at aol.com RLVZ at aol.com
Wed Feb 10 00:05:30 EST 2016

A question regarding roofing filter "configuration bandwidth"  settings on
the K3:

The factory default roofing filter "configuration bandwidth" setting  is to
set the 250hz filter at a setting of "250".  Therefore, the  250hz roofing
filter will engage at the same time as the 250hz DSP filter.
However, since the 250hz roofing filter has an actual BW6 of 370hz,  aren't
there times when it would be more beneficial to have  the "configuration
bandwidth" of the 250hz roofing filter set to 350 or  400?
I'm thinking this may be especially true when operating RTTY since the
average RTTY bandwidth is aprx. 370hz.  Perhaps there are times when  this
would be beneficial when operating other modes as well?

Likewise, the 400hz roofer has a BW6 of 450hz, so perhaps for certain modes
 a "configuration bandwidth" setting of 450 rather than 400 could be
beneficial as well?

If anyone is wondering where I'm getting the term "configuration bandwidth"
 from, it's a configuration heading on the K3 Utility programs filter
configuration page.

Thanks & 73,

Dick- K9OM