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

[Dimitry Borzenko]

Hi group.
Please understand, this nice transceiver is used not only for HF. but 
also for VHF,UHF and uppp.
So, more TX DLY is needed!
LNAs, polarization switches, PA and transverters in the transmission 
line.
Sequencer is nice device but if U press XMIT button - BIG BAGA BUM :(
I hope Elecraft engineers will add additional  TX DLY.

Tnx a lot.


------ Original Message ------
From: "Wayne Burdick" <n6kr at elecraft.com>
To: "john at kk9a.com" <john at kk9a.com>
Cc: ua9cdc at mail.com; elecraft at mailman.qth.net
Sent: 08.06.2018 17:48:26
Subject: Re: [Elecraft] Default K3 transmit delay may be too short for 
slow QRO amplifiers

>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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