Thanks very much for the URL, Jim - I will give this one a try.
73/72, George
Amateur Radio W5YR - the Yellow Rose of Texas
In the 57th year and it just keeps getting better!
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
K2 #489 Icom IC-765 #2349 Icom IC-756 PRO #2121
----- Original Message -----
From: "Jim Reid" <jimr.reid@verizon.net>
To: "Alderman, Chester" <CAlderma@ora.fda.gov>; "'Mike Hyder -N4NT-'"
<N4NT@charter.net>; <AC5E@aol.com>; <w8au@sssnet.com>
Cc: <tentec@contesting.com>
Sent: Thursday, November 28, 2002 5:23 PM
Subject: [TenTec] Key Clicks Made Visible!
> Happy Thanksgiving Weekend!
>
> Have discovered a program, using your mike, computer
> sound card with the mike plugged in, and a free (for 15 days
> use) downloadable program from Germany.
>
> The program uses fast Fourier Transforms to show the audio
> spectrum plus it shows the individual dits and dahs of a CW
> signal. It is called "MRP-40", very interesting. To check it out,
> go to:
>
> http://www.polar-electric.com/Morse/MRP40-EN/index.html
>
> Note the sample screen shot showing a string of dits and dahs.
> When key clicks (artifacts) are present, there will be vertical
> lines going, maybe, both above and below the initial dit or
> dah; also, sometimes at the trailing edge of the CW element.
> These are higher pitch artifacts, if they go up, and lower clicks
> if the tails go down.
>
> Good, clean, click free CW elements have NO tails, either
> going up or down. Try it and see for yourselves -- clicks
> exist on many signals, and also, many signals are very
> clean.
>
> Click on GoMax, and the program selects the strongest
> CW signal of the display to track; or just click the mouse
> on a string of dits/dahs of interest, program again immediately
> will track it.
>
> The side tone pitch to which the FFT filter is tuned appears
> in RED in the small window at the right of the MRP display.
> You can fool around with the FFT settings and the speed of
> the program.
>
> I now know that I am really hearing key clicks, hi. Listen
> to the signals which show the "artifacts"; you can actually
> hear the delta between clean signals and those not.
>
> Just monitored K7UD (14031) who was running an Omni V at 70
> watts at 37 wpm -- no clicks!
>
> 73, Jim KH7M
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