Fellas:
For an off-the-air demo of how well MY KNB2 works, you might want to check out:
http://www.n0ss.net/knb2_demo.zip
This recording was made during a real-time QSO, and NOTHING special
was done. I just hooked the K2's AF output to the laptop PC and
started recording while I enabled the KNB2 and then stepped thru the
two available modes.
The file is ZIPped because it's really a 2MB WAV file. SO you'll have
to UNZIP it before you run it.
Enjoy!
73,
Tom Hammond N0SS
At 02:58 PM 8/27/2006, AA5CK wrote:
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?
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