[Elecraft] KNB2 does not work on my power line noise

Sun Feb 29 11:05:01 2004

Jim are you sure your Noise Blanker in the K2 is working.  I thought =
mine
was useless as even when I used it mobile it didn't do a thing.  Then I
heard reports from other owners that they thought the blanker worked =
great.
So I went on a troubleshooting binge.  Finally figured out a way to test =
it
by making my own pulse noise and trouble shoot it with a scope.  I =
finally
found a bad connection on the pulse output coupling cap.  Resoldered it =
and
reinstalled it and put it in the car, started it up and had 20 over 9 =
noise,
turned the NB on and the noise went down to s2 or 3.  It really does =
work.
If you want some troubleshooting hints and you have a scope handy...let =
me
know and I'll give you a step by step routine to check it out.

73,

Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely open, while
concealing as much as possible.   -States: The Bene Gesserit View
=20

-----Original Message-----
From: [email protected] =
[mailto:[email protected]]
On Behalf Of Jim Brown
Sent: Sunday, February 29, 2004 3:55 PM
To: [email protected]
Subject: Re: [Elecraft] KNB2 does not work on my power line noise

On Sun, 29 Feb 2004 10:39:08 -0500, Roger Marrotte wrote:

> I guess my noise is different enough for the noise
>blanker not to work on it. =20

My KNB2 has yet to find noise that it will blank, and I have some
pretty nasty power line noise on some bands.  Like you, I've wondered
if there is something wrong with mine. The blanker in my Omni V helps
with some of the power line noise. =20

Jim Brown  K9YC

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