I find the same transmit delay when using my Icom 756ProIII as when using my 
K3.  That indicates the transmit delay is coming from the software, not the 
The delay is consistent, ~ 1 second.  Even so, to me a 1 second delay is not a 
problem.  On both radios manual PTT is instantaneous.

Richard, how are you doing PTT -  DTR? RTS? VOX?

73, Ted W4NZ

-----Original Message-----
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne Burdick
Sent: Friday, February 23, 2018 12:20 AM
To: Richard
Cc: Elecraft Reflector
Subject: Re: [Elecraft] K3 And WSJT-X FT8 Timing


There are no long delays inherent in the K3/K3S transmit timing. It should be 
ready to transmit RF within 5 to 15 ms of PTT assertion, depending on mode and 
other factors. 

My apologies; I have not been closely reading this thread. I’ll come up to 
speed and get back to you. 

If this is a transceiver problem, we’ll fix it ASAP. 



> On Feb 22, 2018, at 8:32 PM, Richard <flat...@comcast.net> wrote:
> Maybe I’m missing something, but the “timing” problem with which some of us 
> are fighting has nothing to do with computer clock accuracy. Even if the 
> computer time is off, it’s the only time reference WSJT-X has to work with.
> So the instant the computer tells the software it’s time to transmit, BANG! 
> WSJT-X goes into transmit RIGHT NOW, as it should, late or not, the software 
> doesn’t know and doesn’t care.
> Our problem is that when WSJT-X goes into Transmit at the top of the new 
> segment and tells the K3S to transmit, the K3S DOESN’T transmit. Its almost 
> always late by 2 or 3, sometimes 4 or 5 full seconds. In my case, it 
> eventually doesn’t transmit AT ALL!
> That’s not a software problem or a computer clock problem. It looks like a 
> K3S problem, and I’d sure like to see the solution before I dump this radio.
> Richard - W4KBX
>> On Feb 22, 2018, at 8:36 PM, Bob McGraw K4TAX <rmcg...@blomand.net> wrote:
>> If you are seeing a majority of the decodes in which the DT is less than 
>> <0.5 seconds, your computer clock is close enough for reliable contacts and 
>> decodes.   The software should handle decodes with a DT up to 2.0 seconds, 
>> but in many cases this depends largely {very largely in fact} on signal 
>> quality.  Both as transmitted and received.
>> 73
>> Bob, K4TAX
>>> On 2/22/2018 7:28 PM, Nr4c wrote:
>>> Check the clocks on the computers. Sync them to a time server.
>>> Sent from my iPhone
>>> ...nr4c. bill

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