[Elecraft] KNB2 Performance

[Darrell Bellerive]

Perhaps one of the design wizards that reads this list could come up with 
something like this http://www.ussc.com/~turner/syn_blank.html adapted for HF 
and the K2.

My guess is that noise blanker effectiveness is directly related to the 
characteristics of the noise. One blanker's design specs are effective on 
noise with certain pulse widths and levels, whereas another noise blanker 
works well on eliminating noise with a different pulse width and level. This 
is why one rig's noise blanker works well at one QTH, but the same rig is 
ineffective on the noise at another QTH. Also some locations are plagued with 
more than one noise source, each source having quite different 
characteristics. Now a truly variable multistage noise blanker would be 
wonderful, but I suspect hard to design and costly to build.

I know that this is way beyond my capabilities. But I would build one if 
someone could design and publish the details. A kit would be even better. :-)

Darrell

On July 17, 2005 09:29 am, Joe Squarzini wrote:
> I too have found the KNB2 lacking in most real world noise situations. I
> even built a second one. Yes, when you scratch Q22 it works. However, that
> is irrelevant. Most impulse noise on the air in my area slips right
> through. Compared to the FT1000 and FT736R it is a poor third. Time to
> redesign it. Make it plug compatible and you'll sell many. My order for
> KNB2-2 stands.  Joe K4AA


-- 
Darrell Bellerive
Amateur Radio Stations VA7TO and VE7CLA
Grand Forks, British Columbia, Canada