[ARC5] 1625 and Key Clicks.

[Dennis Monticelli]

Good point, Ken.

My T-22 key clicks were being heard 15 mil away.  I was running about 25
watts to a dipole. A ham friend of mine notified me and complained that
they were pronounced and could be copied all over the CW portion of 40M.
He was right. I looked carefully at the waveform of ARC-5 being keyed and
it was pretty obvious that clicks were being generated.  Whether they are
bad or tolerable in a given situation is a function of the sharpness of the
keying edges and the strength with which your signal is being received.
Nobody is going to be bothered when you are S4 and the noise floor is S3.
S9 is another matter.

My osc runs continuously.  There was no alteration of note when the click
filter was applied to the PA.  Your results may vary.

Clicks are inconsiderate.  In my opinion they should be minimized.
Fortunately, it's not hard to do.

Dennis AE6C.



On Tue, Jul 11, 2017 at 1:04 PM, Kenneth G. Gordon <kgordon2006 at frontier.com
> wrote:

> MY very first question is: "Are these REAL key-clicks, hearable on the air
> by a receiving
> station at least 10 miles away, or are they simply "key-clicks" heard
> "locally", like in your own
> receiver?"
>
> "Local" key-clicks are caused by simple sparking at the key and are not
> transmitted on the
> air.
>
> REAL key-clicks are usually (but not always) caused by too abrupt rise and
> fall of the RF
> wave-form, but can sometimes be caused by parasitics in the amplifier or
> driver.
>
> In my experience, "key-click filters" seldom adequately "adjust" the rise
> and fall times of the
> transmitted carrier, and they very often introduce or accentuate other
> problems, especially
> chirp.
>
> Ken W7EKB
>
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