[Elecraft] Default K3 transmit delay may be too short for slow QRO amplifiers

[john at kk9a.com]

I am sure that just adding a few ms will work with most amplifiers but my
question was what exactly happens to CW. Is it just the first dit that gets
clipped.  Does computer keying with Winkey still perform properly with
longer TX delays?

John KK9A

Sent via the Samsung Galaxy 7 edge, an AT&T 4G LTE smartphone.

On Fri, Jun 8, 2018 at 10:48 AM, Wayne Burdick <n6kr at elecraft.com> wrote:

> Also, a reminder: this is nothing new. We’re just clarifying a delay
> offset that has existed for a long time. There have been no recent firmware
> changes.
>
> It would be possible to modify the K3’s keying algorithm to allow for much
> longer delays (say, 0 to 200 ms). Of course this would significantly shift
> CW RF output in time relative to keying input.
>
> Fortunately, very few amplifiers require more that a few ms of extra
> delay.
>
> 73,
> Wayne
> N6KR
>
>
> ----
> http://www.elecraft.com
>
> > On Jun 8, 2018, at 7:33 AM, Wayne Burdick <n6kr at elecraft.com> wrote:
> >
> > The delay can be set from 8-20 ms at present. Given the small time
> offset, this is actually 5-17 ms (approx). Use small values if possible.
> >
> > With external keying, you can generally compensate by reducing the
> device’s weighting.
> >
> > Wayne
> >
> > ----
> > http://www.elecraft.com
> >
> >> On Jun 8, 2018, at 5:02 AM, "john at kk9a.com" <john at kk9a.com> wrote:
> >>
> >> I agree that 5ms is too fast for many amplifiers. Is computer sent CW
> also
> >> spoiled when increasing the delay?  Does it only effect QSK or all
> >> transmissions?
> >>
> >> John KK9A
> >>
> >> Igor Sokolov ua9cdc wrote:
> >>
> >> Wayne it is a pity that TX delay setting affects CW timing. Changing TX
> >> delay from default even one or two steps makes CW much worth. Can you
> >> figure out a way to make CW timing independent from TX delay? With 5 ms
> >> TX delay working in many contests I already had to change a pair of
> >> relays in the amplifier. 10-12 ms would be fine for me. 20 ms will
> >> probably suit the majority of users. But 5 ms is way too fast and
> >> unfortunately cannot be altered without spoiling CW sending. I know that
> >> I could build external sequencer but this does not look neat enough
> >> especially for portable field operation. Every other radio I had allowed
> >> TX delay adjustment to at least 20 ms.
> >>
> >> 73, Igor UA9CDC
> >>
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