[Elecraft] K2 noise blanker

[Ron D'Eau Claire]

IMX with the K2 Noise Blanker there's little or no degradation of normal
signals. However, it can produce intermod noise when strong signals are
present. After all, it does "punch holes" in the signal where the noise
pulses would normally be. That action makes the noise blanker a mixer as
well which will produce artifacts. Some of them are recognizable as such.
Some will merely sound like excess QRN. (That's why the NB has a switch. One
doesn't want it on unless it needs to be on :-) Even so, I've not
experienced significant intermod issues with the KNB2 but I don't live close
to any high powered stations either. 

There are several technical articles on the Elecraft site that might give
you some ideas. One of the early Elecraft customers, Sverre Holm, LA3ZA, put
together a wonderful page of K2 mods with links to the various documents.
Check here for info about the KNB2:

http://www.qslnet.de/member/la3za/K2/modAny.html#KNB2

I've seen some references to various ways to "test" your noise blanker over
time. I didn't explore them because I had a test of my own: I own a lamp
with a cheap dimmer. The KNB2 kills the racket completely when it must be
on. Fortunately, I also own the lamp and can turn it off! 

Also might post a query to "support at elecraft.com" 

73,

Ron AC7AC

-----Original Message-----

I have tried it on various types of noises, some which sounded like auto 
ignition noise, I think someone had something running without resistor wires

or plugs, strong and weak signals, no change.
I did have a bad street light out front of my house, the reason I got the 
NB, but they fixed it before I got the noise blanker.

The main reason I asked was there seems to be no degradation of signals with

the NB on at any setting.
On most rigs, you can hear a difference, and where its adjustable, it makes 
things sound really bad when you turn it up. The pro 3 is like that.

On the K2, I have been unable to detect it doing anything at all, any mode, 
any noise, although the noise level I usually have is not bad.

Thanks for the replies,
Brett
N2DTS