[Elecraft] KNB2 Question

Jibeji [email protected]
Tue Apr 29 03:14:01 2003


Thank you for your answer Bruce.
You are right : narrowing bandpass filter have solved the problem I
encountered. I don't know what were this QRM, I saw some dashes every kHz on
PRO's scope. I live in the center of Paris and there is a lot of QRM...
In the other hand, I tried to run a drilling tool near the K2 and I can
confirm that KNB2 is really effective !
73
--
F8DQL - UFT 1116
K2/100 #3249


Bruce D. McLaughlin wrote:
> It depends.  If it is really QRM as opposed to QRN the noise blanker
> really won't do much.  It is designed to reduce noise not other,
> unwanted signals.  Perhaps you have been using your notch filter on
> the Pro or maybe IF shift or narrower filter settings.  All of those
> devices can help significantly with some types of QRM.  I do own a
> Pro and am familiar with them.
> I've found the noise blanker on the K2 really is very good at doing
> what was intended - - reducing man made and even some natural noise.
> But it won't do anything for real QRM.  You can try using narrower
> filter settings on the K2 or, if you are operating CW, the reverse CW
> setting. That should help.  The audio filter, if you have it, should
> also help.
>
> Bruce - W8FU