[Elecraft] Key Clicks

[Victor Rosenthal 4X6GP]

In fact, it's closer to 5-6 ms when set to 8. And of course it depends 
on the amp. A general rule to "set it to 9" is silly. It just has to 
give the relays time to settle down.


73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 07-Jun-2020 04:00, David Gilbert wrote:
> QSK has everything to do with it.  If you hot switch the amp you create
> sharp waveforms every element even if the K3 keying is soft.  The
> discussion on the contesting forum included comments that the default
> setting for TXDELAY on the K3 (apparently 008) isn't long enough and that
> it should be set to 009.  Not sure which amps were being considered.
> 
> 73,
> Dave   AB7E
> 
> On Sat, Jun 6, 2020 at 5:40 PM John Simmons <jasimmons at pinewooddata.com>
> wrote:
> 
>> I have operated a number of the 'big' CW contests. I have heard some
>> really, really wide sigs with horrible key clicks. Yes they were
>> strong.... but 10 KHz wide? Rob Sherwood and others have written about
>> this. Some of the really high-end rigs (non-Elecraft) allow user
>> adjustment of CW rise time to such short values that key clicks are
>> guaranteed. Yech!
>>
>> -de John NI0K
>>
>> Fred Jensen wrote on 6/6/2020 7:05 PM:
>>> True. TXDelay is a sequencing parameter to assure that downstream
>>> switching has completed before RF appears. The keying waveform
>>> [particularly the edges and "corners"] affect the sidebands and thus
>>> bandwidth of the CW signal.  I don't believe QSK has anything to do
>>> with it, at least for a K3.
>>>
>>> 73,
>>> Fred ["Skip"] K6DGW
>>> Sparks NV DM09dn
>>> Washoe County
>>>
>>> On 6/6/2020 4:55 PM, N4ZR wrote:
>>>> There's a big discussion going on in contesting circles online about
>>>> the problem of key clicks.  There's been a lot of discussion about
>>>> settings called things like TXDelay, but so far as I can tell (and
>>>> the manual confirms), the K3's TX delay is intended to protect
>>>> amplifier relays at the start of a transmission.  So long as you
>>>> don't run QSK, I would think that setting would have no influence on
>>>> key clicks after the rise of the first CW element.  True?
>>>
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