[Elecraft] Noise Blanker

[Jimmy Walker]

I'm arriving at this conversation a bit late, but let me ask this question. 
I have a relatively newly assembled K-2, working perfectly as far as I can 
tell. I have the KNB2 assembled and ready to install. After reading these 
posts, I'm wondering if I should bother to do it. I find, as Ron said, the 
filters do a good job with atmospheric noise. I don't have anything else 
unusual here in the way of noise. Sometimes I get line noise, but it's so 
irritating I usually don't try to work through it. I'll wait it out.

So, should I risk the uninstalling of resistors and cutting of jumpers on a 
good radio for the improvement offered by the noise blanker?

Jimmy Walker
WA4ILO
Macon, GA


----- Original Message ----- 
From: "ron" <roncasa at verizon.net>
To: <elecraft at mailman.qth.net>
Sent: Wednesday, September 27, 2006 5:50 PM
Subject: Re: [Elecraft] Noise Blanker


> Hello all;
>
> I push on a CW "filter" and it does the same thing!
> I also press attenuate with same results!
>
> Unh? Noise blanker and/or filter does same thing?
>
> Why?
> Because filters and NB may "appear" to remove atmospheric noise, but it's 
> still there, because it's attenuated. (There's a little more to that but 
> not here)
>
> Noise blankers work more effectively on man-made noise such as 
> automobiles, lights, motors, hair dryers (pulse type noise) etc.
> Not atmospheric noises.
>
> Oh,
> after you did that, you probably had to turn up the volume a bit like I 
> did.
> It make for easier listening though.
>
> Regardless, I love me K1.
> (smile)
>
> Ron, wb1hga
>
> W.D. (Doc) Lindsey wrote:
>
>
>> evening here on 30Metres, and the QRN seemed incessant, I [probably]
>> accidentally pushed the NB button on a K2.  And suddenly the noise all 
>> but
>> disappeared.  Since then I have come to use it regularly, as there seems 
>> to
>> be a whole lot of QRN here in the tiny subdivision.  But the NB will
>> normally knock it down to listenable levels.
>
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