[Elecraft] K3/K3S: How to adjust SSB receive bandwidth up to 4.0 kHz

[Joe Subich, W4TV]

On 5/12/2016 3:07 PM, Bill Frantz wrote:
> While working in this part of the firmware, could 4K receive passband be
> made to work with the 13KHz FM filter as well?

4 KHz receive passband *already works* with the FM filter.  Simply set
FC (shift) = 2.0 - 2.2 and dial in the desired bandwidth.  The *only*
reason that one does not get the full bandwidth is that shift is less
that 1/2 the width.  The actual bandwidth achieved with the K3 in shift 
- width mode is [FC (Shift) + BW/2]

73,

    ... Joe, W4TV