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K3 And WSJT-X FT8 Timing

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James Bennett

K3 And WSJT-X FT8 Timing

Got a question about using my K3 with WSJT-X 1.8.0 with FT8

I started looking at the “time bar” in WSJT-X and when the K3’s red TX light comes on with the meter showing RF going out. It is between 1.5 and 2 seconds after the beginning of the new 15 second sequence! In that short duration, I am hearing other stations’ signals coming through on my headphones, so I know that other folks are getting their rig to transmit right at the start of the 15 second sequence. If mine is coming on 1.5 - 2 seconds late, I’m thinking I may not always get decoded on the other end.

So, I switched over to my KX3 running the same version of WSJT-X and observed what happened there. No delay - when the new 15 second sequence starts, the KX3 goes into transmit almost immediately.

Both the KX3 and the K3 are connected to two identical Tascam USB125M external sound cards.

Is there some setting on the K3 that is causing my transmissions to fire off a tad late?

Jim / W6JHB
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Dennis Moore

Re: K3 And WSJT-X FT8 Timing

How are you keying the K3, VOX or PTT?

It's not clear from the email, are the K3 and KX3 on separate computers
on just different sound cards in the same computer?

73, Dennis NJ6G

On 2/22/2018 14:22, James Bennett wrote:

> Got a question about using my K3 with WSJT-X 1.8.0 with FT8
>
> I started looking at the “time bar” in WSJT-X and when the K3’s red TX light comes on with the meter showing RF going out. It is between 1.5 and 2 seconds after the beginning of the new 15 second sequence! In that short duration, I am hearing other stations’ signals coming through on my headphones, so I know that other folks are getting their rig to transmit right at the start of the 15 second sequence. If mine is coming on 1.5 - 2 seconds late, I’m thinking I may not always get decoded on the other end.
>
> So, I switched over to my KX3 running the same version of WSJT-X and observed what happened there. No delay - when the new 15 second sequence starts, the KX3 goes into transmit almost immediately.
>
> Both the KX3 and the K3 are connected to two identical Tascam USB125M external sound cards.
>
> Is there some setting on the K3 that is causing my transmissions to fire off a tad late?
>
> Jim / W6JHB

James Bennett

Re: K3 And WSJT-X FT8 Timing

Hi Dennis - how you doing?

Sorry I neglected to provide enough info - was in a hurry to post that before I had to run out to pickup kids at school (close to your dads QTH!)

I am using VOX on both rigs. Each rig has it’s own computer and separate, but identical external USB sound cards. The K3 is connected to an iMac and the KX3 is connected to a Raspberry Pi 3.

Jim / W6JHB

> On Feb 22, 2018, at 2:31 PM, Dennis Moore <[hidden email]> wrote:
>
> How are you keying the K3, VOX or PTT?
>
> It's not clear from the email, are the K3 and KX3 on separate computers on just different sound cards in the same computer?
>
> 73, Dennis NJ6G
>
>
> On 2/22/2018 14:22, James Bennett wrote:
>> Got a question about using my K3 with WSJT-X 1.8.0 with FT8
>>
>> I started looking at the “time bar” in WSJT-X and when the K3’s red TX light comes on with the meter showing RF going out. It is between 1.5 and 2 seconds after the beginning of the new 15 second sequence! In that short duration, I am hearing other stations’ signals coming through on my headphones, so I know that other folks are getting their rig to transmit right at the start of the 15 second sequence. If mine is coming on 1.5 - 2 seconds late, I’m thinking I may not always get decoded on the other end.
>>
>> So, I switched over to my KX3 running the same version of WSJT-X and observed what happened there. No delay - when the new 15 second sequence starts, the KX3 goes into transmit almost immediately.
>>
>> Both the KX3 and the K3 are connected to two identical Tascam USB125M external sound cards.
>>
>> Is there some setting on the K3 that is causing my transmissions to fire off a tad late?
>>
>> Jim / W6JHB
>
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Jim - N4ST

Re: K3 And WSJT-X FT8 Timing

Jim,

Since you are using separate computers, are you sure the time is correct on your K3S computer?
Since you are using separate computers, can you monitor your K3S transmissions on your KX3 system and see what delay it is showing?

_________
73,
Jim - N4ST

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of James Bennett
Sent: Thursday, February 22, 2018 18:30
To: Elecraft Reflector Reflector <[hidden email]>
Subject: Re: [Elecraft] K3 And WSJT-X FT8 Timing

Hi Dennis - how you doing?

Sorry I neglected to provide enough info - was in a hurry to post that before I had to run out to pickup kids at school (close to your dads QTH!)

I am using VOX on both rigs. Each rig has it’s own computer and separate, but identical external USB sound cards. The K3 is connected to an iMac and the KX3 is connected to a Raspberry Pi 3.

Jim / W6JHB

> On Feb 22, 2018, at 2:31 PM, Dennis Moore <[hidden email]> wrote:
>
> How are you keying the K3, VOX or PTT?
>
> It's not clear from the email, are the K3 and KX3 on separate computers on just different sound cards in the same computer?
>
> 73, Dennis NJ6G
>
>
> On 2/22/2018 14:22, James Bennett wrote:
>> Got a question about using my K3 with WSJT-X 1.8.0 with FT8
>>
>> I started looking at the “time bar” in WSJT-X and when the K3’s red TX light comes on with the meter showing RF going out. It is between 1.5 and 2 seconds after the beginning of the new 15 second sequence! In that short duration, I am hearing other stations’ signals coming through on my headphones, so I know that other folks are getting their rig to transmit right at the start of the 15 second sequence. If mine is coming on 1.5 - 2 seconds late, I’m thinking I may not always get decoded on the other end.
>>
>> So, I switched over to my KX3 running the same version of WSJT-X and observed what happened there. No delay - when the new 15 second sequence starts, the KX3 goes into transmit almost immediately.
>>
>> Both the KX3 and the K3 are connected to two identical Tascam USB125M external sound cards.
>>
>> Is there some setting on the K3 that is causing my transmissions to fire off a tad late?
>>
>> Jim / W6JHB
>
> ______________________________________________________________
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Bob McGraw - K4TAX

Re: K3 And WSJT-X FT8 Timing

In reply to this post by James Bennett

Within WSJT-X there is a slight delay between the time the PTT command
is issues and the start of DATA audio.   The value is established via
the F2 setup menu, Advanced page, under Miscellaneous.    Additionally
if you are using VOX control via the radio, this delay of audio is very
apparent.   I suggest you configure for CAT control. Also, if you are
using VOX the VOX delay must time out before the radio returns to receive.

Depending on other applications which may be running on the computer,
the lag time due to processor activity may be apparent as well. And
there is processor timing activities within the radio which adds delay
time to transitions.

I find CAT control to be preferable to VOX control.

73

Bob

On 2/22/2018 4:22 PM, James Bennett wrote:

Nr4c

Re: K3 And WSJT-X FT8 Timing

In reply to this post by James Bennett

Check the clocks on the computers. Sync them to a time server.

Sent from my iPhone
...nr4c. bill

> On Feb 22, 2018, at 6:30 PM, James Bennett <[hidden email]> wrote:
>
> Hi Dennis - how you doing?
>
> Sorry I neglected to provide enough info - was in a hurry to post that before I had to run out to pickup kids at school (close to your dads QTH!)
>
> I am using VOX on both rigs. Each rig has it’s own computer and separate, but identical external USB sound cards. The K3 is connected to an iMac and the KX3 is connected to a Raspberry Pi 3.
>
> Jim / W6JHB
>
>
>
>> On Feb 22, 2018, at 2:31 PM, Dennis Moore <[hidden email]> wrote:
>>
>> How are you keying the K3, VOX or PTT?
>>
>> It's not clear from the email, are the K3 and KX3 on separate computers on just different sound cards in the same computer?
>>
>> 73, Dennis NJ6G
>>
>>
>>> On 2/22/2018 14:22, James Bennett wrote:
>>> Got a question about using my K3 with WSJT-X 1.8.0 with FT8
>>>
>>> I started looking at the “time bar” in WSJT-X and when the K3’s red TX light comes on with the meter showing RF going out. It is between 1.5 and 2 seconds after the beginning of the new 15 second sequence! In that short duration, I am hearing other stations’ signals coming through on my headphones, so I know that other folks are getting their rig to transmit right at the start of the 15 second sequence. If mine is coming on 1.5 - 2 seconds late, I’m thinking I may not always get decoded on the other end.
>>>
>>> So, I switched over to my KX3 running the same version of WSJT-X and observed what happened there. No delay - when the new 15 second sequence starts, the KX3 goes into transmit almost immediately.
>>>
>>> Both the KX3 and the K3 are connected to two identical Tascam USB125M external sound cards.
>>>
>>> Is there some setting on the K3 that is causing my transmissions to fire off a tad late?
>>>
>>> Jim / W6JHB
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
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> Post: mai

Bob McGraw - K4TAX

Re: K3 And WSJT-X FT8 Timing

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
>
>
>> On Feb 22, 2018, at 6:30 PM, James Bennett <[hidden email]> wrote:
>>
>> Hi Dennis - how you doing?
>>
>> Sorry I neglected to provide enough info - was in a hurry to post that before I had to run out to pickup kids at school (close to your dads QTH!)
>>
>> I am using VOX on both rigs. Each rig has it’s own computer and separate, but identical external USB sound cards. The K3 is connected to an iMac and the KX3 is connected to a Raspberry Pi 3.
>>
>> Jim / W6JHB
>>
>>
>>
>>> On Feb 22, 2018, at 2:31 PM, Dennis Moore <[hidden email]> wrote:
>>>
>>> How are you keying the K3, VOX or PTT?
>>>
>>> It's not clear from the email, are the K3 and KX3 on separate computers on just different sound cards in the same computer?
>>>
>>> 73, Dennis NJ6G
>>>
>>>
>>>> On 2/22/2018 14:22, James Bennett wrote:
>>>> Got a question about using my K3 with WSJT-X 1.8.0 with FT8
>>>>
>>>> I started looking at the “time bar” in WSJT-X and when the K3’s red TX light comes on with the meter showing RF going out. It is between 1.5 and 2 seconds after the beginning of the new 15 second sequence! In that short duration, I am hearing other stations’ signals coming through on my headphones, so I know that other folks are getting their rig to transmit right at the start of the 15 second sequence. If mine is coming on 1.5 - 2 seconds late, I’m thinking I may not always get decoded on the other end.
>>>>
>>>> So, I switched over to my KX3 running the same version of WSJT-X and observed what happened there. No delay - when the new 15 second sequence starts, the KX3 goes into transmit almost immediately.
>>>>
>>>> Both the KX3 and the K3 are connected to two identical Tascam USB125M external sound cards.
>>>>
>>>> Is there some setting on the K3 that is causing my transmissions to fire off a tad late?
>>>>
>>>> Jim / W6JHB
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mai
> ______________________________________________________________
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>
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> Message delivered to [hidden email]

James Bennett

Re: K3 And WSJT-X FT8 Timing

In reply to this post by Nr4c

Guys - sorry for the delay in responding to your posts - places to go, things to do, all overriding ham radio for a couple hours.

It was suggested that I see if I’m out of sync on my computer clock(s). Well, here is the strange thing: the iMac that the K3 is connected to consistently is giving me a DT response of 0.1 to 0.2 on 90% of the decoded stations, so I’m thinking that the default time server the iMac / OSX is connected to is pretty accurate. But it is this rig that starts it’s transmission a bit late.

The RPi 3 that the KX3 is connected to consistently is giving me DT figures around -0.8 to -0.9. which makes me think my time sync is a little off. But the KX3 connected to this RPi starts right up when it is supposed to. Interestingly, that RPi 3 is connected via short Ethernet to another RPi 3 that runs it’s own GPS-sync’d NTP server. Go figure.

I’m stumped.

> On Feb 22, 2018, at 5:28 PM, Nr4c <[hidden email]> wrote:
>
> Check the clocks on the computers. Sync them to a time server.
>
> Sent from my iPhone
> ...nr4c. bill
>
>
>> On Feb 22, 2018, at 6:30 PM, James Bennett <[hidden email]> wrote:
>>
>> Hi Dennis - how you doing?
>>
>> Sorry I neglected to provide enough info - was in a hurry to post that before I had to run out to pickup kids at school (close to your dads QTH!)
>>
>> I am using VOX on both rigs. Each rig has it’s own computer and separate, but identical external USB sound cards. The K3 is connected to an iMac and the KX3 is connected to a Raspberry Pi 3.
>>
>> Jim / W6JHB
>>
>>
>>
>>> On Feb 22, 2018, at 2:31 PM, Dennis Moore <[hidden email]> wrote:
>>>
>>> How are you keying the K3, VOX or PTT?
>>>
>>> It's not clear from the email, are the K3 and KX3 on separate computers on just different sound cards in the same computer?
>>>
>>> 73, Dennis NJ6G
>>>
>>>
>>>> On 2/22/2018 14:22, James Bennett wrote:
>>>> Got a question about using my K3 with WSJT-X 1.8.0 with FT8
>>>>
>>>> I started looking at the “time bar” in WSJT-X and when the K3’s red TX light comes on with the meter showing RF going out. It is between 1.5 and 2 seconds after the beginning of the new 15 second sequence! In that short duration, I am hearing other stations’ signals coming through on my headphones, so I know that other folks are getting their rig to transmit right at the start of the 15 second sequence. If mine is coming on 1.5 - 2 seconds late, I’m thinking I may not always get decoded on the other end.
>>>>
>>>> So, I switched over to my KX3 running the same version of WSJT-X and observed what happened there. No delay - when the new 15 second sequence starts, the KX3 goes into transmit almost immediately.
>>>>
>>>> Both the KX3 and the K3 are connected to two identical Tascam USB125M external sound cards.
>>>>
>>>> Is there some setting on the K3 that is causing my transmissions to fire off a tad late?
>>>>
>>>> Jim / W6JHB
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mai
>

Richard-6

Re: K3 And WSJT-X FT8 Timing

In reply to this post by Bob McGraw - K4TAX

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 <[hidden email]> 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

wayne burdick

Re: K3 And WSJT-X FT8 Timing

Administrator

RIchard,

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.

Wayne
N6KR

----
http://www.elecraft.com

> On Feb 22, 2018, at 8:32 PM, Richard <[hidden email]> 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 <[hidden email]> 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
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Elecraft mailing list

Re: K3 And WSJT-X FT8 Timing

In reply to this post by Richard-6

Richard,
I had a similar problem with the K3S not stopping transmit. Finally fixed it by changing the stop bit in the radio settings from two to one.
Dick, K8ZTT
On Thursday, February 22, 2018, 9:32:59 PM MST, Richard <[hidden email]> 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

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Ted Bryant

Re: K3 And WSJT-X FT8 Timing

In reply to this post by wayne burdick

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 radio.
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: [hidden email] [mailto:[hidden email]] 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

RIchard,

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.

Wayne
N6KR

----
http://www.elecraft.com

John Harper

Re: K3 And WSJT-X FT8 Timing

In reply to this post by James Bennett

He's using VOX. Does that not introduce an additional delay over what PTT
would have?

John AE5X
https://ae5x.blogspot.com
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NK7Z

Re: K3 And WSJT-X FT8 Timing

In reply to this post by wayne burdick

I use my K3 on FT8 daily, and have never had a long delay, not once, I
have used both one stop bit, and two stop bits, and can see no
difference between the two.

Is it possible something is autobauding? I have every thing set
explicitly to 38.4K. The WSJT-S software, the com port on the computer,
and the radio. Nothing is searching for speeds...

Many people forget that the computer might auto search for speed if not
set to the speed presented to the com port.

I am running 38K speed, and have set the computer to do 38.4K as well.
I would look to my computer for the delay, not the K3, unless the K3 is
broken... My K3 is in RS242 B mode at 38.4K.

73s and thanks,
Dave
NK7Z
https://www.nk7z.net

On 02/22/2018 09:19 PM, Wayne Burdick wrote:

> RIchard,
>
> 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.
>
> Wayne
> N6KR
>
> ----
> http://www.elecraft.com
>
>> On Feb 22, 2018, at 8:32 PM, Richard <[hidden email]> 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 <[hidden email]> 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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NK7Z

Re: K3 And WSJT-X FT8 Timing

In reply to this post by John Harper

Yes! I never use VOX for that reason.

73s and thanks,
Dave
NK7Z
https://www.nk7z.net

On 02/23/2018 05:48 AM, John Harper wrote:

> He's using VOX. Does that not introduce an additional delay over what PTT
> would have?
>
> John AE5X
> https://ae5x.blogspot.com
> ______________________________________________________________
> Elecraft mailing list
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>
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Ted Bryant

Re: K3 And WSJT-X FT8 Timing

Hardly. There is no delay adjustment for VOX activation, just sensitivity.
if the VOX sensitivity is set correctly, activation is virtually
instantaneous. It is the VOX release where the delay is adjustable.

73, Ted W4NZ

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Dave Cole (NK7Z)
Sent: Friday, February 23, 2018 8:55 AM
To: [hidden email]
Subject: Re: [Elecraft] K3 And WSJT-X FT8 Timing

Yes! I never use VOX for that reason.

73s and thanks,
Dave
NK7Z
https://www.nk7z.net

On 02/23/2018 05:48 AM, John Harper wrote:

> He's using VOX. Does that not introduce an additional delay over what
> PTT would have?
>
> John AE5X
> https://ae5x.blogspot.com
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> [hidden email]
>

______________________________________________________________
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Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
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delivered to [hidden email]

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Wes Stewart-2

Re: K3 And WSJT-X FT8 Timing

In reply to this post by NK7Z

Before I abandoned the use of FT8, and after FT8 was fixed to remove delay
issues with K3s, I used VOX exclusively. Same is true on CW, SSB and RTTY.

Wes N7WS

On 2/23/2018 6:55 AM, Dave Cole (NK7Z) wrote:

> Yes! I never use VOX for that reason.
>
> 73s and thanks,
> Dave
> NK7Z
> https://www.nk7z.net
>
> On 02/23/2018 05:48 AM, John Harper wrote:
>> He's using VOX. Does that not introduce an additional delay over what PTT
>> would have?
>>
>> John AE5X
>> https://ae5x.blogspot.com
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
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Bob McGraw - K4TAX

Re: K3 And WSJT-X FT8 Timing

In reply to this post by Ted Bryant

But there is a delay in WSJT-X. See the F2 Setup, Advanced tab and
Miscellaneous. Make sure the TX Delay is set to 0.1 sec. This is the
time delay between PTT and start of audio. Also, if one uses CAT
control, then be sure the VOX on the radio is OFF. Don't use both.

73

Bob, K4TAX

On 2/23/2018 8:19 AM, Ted Bryant wrote:

> Hardly. There is no delay adjustment for VOX activation, just sensitivity.
> if the VOX sensitivity is set correctly, activation is virtually
> instantaneous. It is the VOX release where the delay is adjustable.
>
> 73, Ted W4NZ
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Dave Cole (NK7Z)
> Sent: Friday, February 23, 2018 8:55 AM
> To: [hidden email]
> Subject: Re: [Elecraft] K3 And WSJT-X FT8 Timing
>
> Yes! I never use VOX for that reason.
>
> 73s and thanks,
> Dave
> NK7Z
> https://www.nk7z.net
>
> On 02/23/2018 05:48 AM, John Harper wrote:
>> He's using VOX. Does that not introduce an additional delay over what
>> PTT would have?
>>
>> John AE5X
>> https://ae5x.blogspot.com
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html Message delivered to
>> [hidden email]
>>
> ______________________________________________________________
> Elecraft mailing list
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html Message
> delivered to [hidden email]
>
> ______________________________________________________________
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NK7Z

Re: K3 And WSJT-X FT8 Timing

In reply to this post by Ted Bryant

You state, "if the VOX sensitivity is set correctly" which is an unknown
at this point, so yes, it could be VOX.

73s and thanks,
Dave
NK7Z
https://www.nk7z.net

On 02/23/2018 06:19 AM, Ted Bryant wrote:

Bob McGraw - K4TAX

Re: K3 And WSJT-X FT8 Timing

My concern with using VOX is that the radio has to receive audio before
it goes into transmit. Thus one can almost be assured some data will be
lost. Hence I find the better PTT choice is CAT with a 0.1 second TX
delay before audio is sent to the radio from the software. This is all
available from the F2 Setup menu in WSJT-X.

73

Bob, K4TAX

On 2/23/2018 8:45 AM, Dave Cole (NK7Z) wrote:

> You state, "if the VOX sensitivity is set correctly" which is an
> unknown at this point, so yes, it could be VOX.
>
> 73s and thanks,
> Dave
> NK7Z
> https://www.nk7z.net
>
> On 02/23/2018 06:19 AM, Ted Bryant wrote:
>> Hardly. There is no delay adjustment for VOX activation, just
>> sensitivity.
>> if the VOX sensitivity is set correctly, activation is virtually
>> instantaneous. It is the VOX release where the delay is adjustable.
>>
>> 73, Ted W4NZ
>>
>> -----Original Message-----
>> From: [hidden email]
>> [mailto:[hidden email]] On Behalf Of Dave Cole (NK7Z)
>> Sent: Friday, February 23, 2018 8:55 AM
>> To: [hidden email]
>> Subject: Re: [Elecraft] K3 And WSJT-X FT8 Timing
>>
>> Yes! I never use VOX for that reason.
>>
>> 73s and thanks,
>> Dave
>> NK7Z
>> https://www.nk7z.net
>>
>> On 02/23/2018 05:48 AM, John Harper wrote:
>>> He's using VOX. Does that not introduce an additional delay over what
>>> PTT would have?
>>>
>>> John AE5X
>>> https://ae5x.blogspot.com
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net Please help support this email
>>> list: http://www.qsl.net/donate.html Message delivered to
>>> [hidden email]
>>>
>> ______________________________________________________________
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>>
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>> delivered to [hidden email]
>>
>> ______________________________________________________________
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> ______________________________________________________________
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