[Elecraft] Fwd: New Sherwood report

[Jan Erik Holm]

Yes I do know that it´s not the rise/fall time
alone, that has never been my point. However
one factor is the rise/fall and if it´s too fast
it will not be possible to fix it with shaping.

Why, yes IMO the K3 clicks too much. I know it
can be done since there are radios around that
doesn´t click at all and at the same time the
keying is "hard enough" for normal CW use. Sure
you can´t key it to 500-600 lpm but thats not
normal CW.

/ Jim SM2EKM
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On 2010-12-03 16:00, Paul Christensen wrote:
>> OK. AFAIK at 4 ms a CW TX will have to much
> bandwith. Even the K3 at 5 ms (if it hasen´t changed
> since I measured it) do have "mild clicks".
>
> It' not strictly the rise/fall time, it's the shape of the RF envelope
> within the rise/fall time.
>
> http://www.w8ji.com/cw_bandwidth_described.htm
>
> Using the internal calibrator on my Tektronix SC504, I just measured the K3
> rise time at 2.5 ms.  I measure from the time the envelope just begins to
> take off from zero until the point that full amplitude is reached.
> Actually, full power on my K3 is not achieved for several more msec, but the
> dominant transition to the full power is measured at 2.5 ms.
>
>> I wish the K3 could be set to something like 7 or 8 ms.
>
> Why?
>
> Paul, W9AC
>