[TenTec] Key Clicks Made Visible!

[George, W5YR]

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