[Elecraft] RE: How does K2 NB work?

[AA5CK]

If you have any doubts whether your K2NB can handle pulse type noise 
here are a couple of simple circuits that can either ease your mind or 
send it to the bench.

The first is a pulse-generator/signal tracer/audio amp that works well 
as such and produces a 10uS pulse. A 2N3904 and 2N3906 may be used.

            
http://www.electronics-lab.com/projects/oscillators_timers/012/index.html

The second produces pulse widths of approx. 10uS to 500uS with C1 values 
between 470pF and .047uF.

            http://www.electronics.50g.com/cpg.htm

Also don't forget, as others on the list have noted, sometimes the 
preamp must be used to amplify the noise enough to trigger the K2NB.

Good Luck...Ted...aa5ck

David Walker wrote:
> It doesn't.  Don't waste your time on this option.
>
>
>> Thinking of building my 2nd K2.  I wondered what
>> the consensus is on HOW WELL DOES THE NB WORK?in a K2?
>