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

[Wayne Burdick]

Hi all,

The K3's SSB receive passband can be widened to as much as 4.0 kHz if you have a 6.0 kHz crystal filter. This is useful for ESSB in particular. However, there's a minor problem with the present firmware that requires a workaround (for now).

The trick is that you have to have LO/HI CUT selected rather than SHIFT/WIDTH. If you select LO/HI CUT, then NORMalize the passband, you can adjust HI CUT to as high as 4.00, and the DSP's bandwidth will be set up accordingly.

If you have WIDTH/SHIFT selected, you may only be able to get the DSP's bandwidth up to 3.50 kHz, even though the display says 4.00. 

(Barry, N1EU, discovered this idiosyncrasy. Thanks!)

73,
Wayne
N6KR