[Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

[Wayne Burdick]

Hi Tim,

The 15 kHz filter may work for this purpose in SSB mode. Haven't tried it yet, so it's even more experimental. Still, if you're game, just set the bandwidth of the FM filter (always FL1, if it's present), to a bandwidth just a little over the bandwidth of your normal SSB filter. For example, if the SSB filter is 2.8 kHz, set the FM filter bandwidth to 2.9 kHz.

Remember the caveat: Widening the filter will allow more in-band interference to slip through, which may require that you reduce gain (RF GAIN, preamp, or attenuator). 

AM and FM already use wide crystal filters, so the experimental technique I described will not offer any further improvement in these modes. It sure works well (for me, at least) in narrow modes. 

Let me know what you find.

73,
Wayne
N6KR


Tim Tucker <ae6lx at worldwidedx.com> wrote:

> Wayne,
> 
> What is the difference in configuration to trying this on SSB? Do we make
> the same settings change or change Filter 1 if we have the 13Khz filter?
> And how are AM and FM affected?
> 
> I've got the type of noise you're referring to here from local plasma TV
> interference...I'd love to try this on SSB.