[Elecraft] K3 Questions and gripes

[Joe Subich, W4TV]

 > If you have the 6-kHz filter installed, you can increase the
 > effectiveness of the DSP NB with some kinds of noise in SSB mode; just
 > set WIDTH above 2.8 kHz so this wider filter will be selected.

Or modify your configuration so the wider roofing filter is always
selected in SSB <G>.

Wayne, this is a place the XFIL button could be made more useful ...
allow it to select the roofing filter independent of the "Width"
(DSP) setting.

73,

    ... Joe, W4TV


On 12/14/2010 12:12 PM, Wayne Burdick wrote:
> Scott,
>
> On Dec 14, 2010, at 8:28 AM, Scott Ellington wrote:
>
>> The K3 noise blanker bandpass filter appears to have a bandwidth of
>> about 400 kHz....
>
>> I'm just guessing, but it seems Elecraft took a different approach
>> in using the very wide bandwidth.  This increases the peak amplitude
>> of the noise pulses, allowing them to be detected at a higher
>> threshold while, under crowded band conditions, the strongest signal
>> remains about the same....
>
> Exactly.
>
> If you need a narrow-band blanker, use the DSP NB. It is very
> effective on a wide range of noise types, and is post-crystal filter.
>
> If you have the 6-kHz filter installed, you can increase the
> effectiveness of the DSP NB with some kinds of noise in SSB mode; just
> set WIDTH above 2.8 kHz so this wider filter will be selected.
>
> Wayne
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>