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K3 - AFSK

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Robie Elms-2

K3 - AFSK

All,

I have very limited experience with a K3 and I am helping a fellow club
member get up and running on RTTY with his K3. Here is the setup:

1. We are using MMTTY in the AFSK mode

2. line in/out on the transceiver connected to the computer sound card mic
and speaker input/output

3. PTT is via command the radio control port.

The problem we are having is intermittent transmission of data. At times
the set up works properly and then later when transmitting the K3 sends
only a steady carrier. It appears that the computer is outputting audio
tones to the K3 when this situation occurs. What are the potential causes
of this problem. Any suggestions will be appreciated.

Robie - AJ4F
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w0mu

Re: K3 - AFSK

It doesn't solve you issue but the K3 is really good with FSK, ie clean.

RF? have you put ferrites on the cables with a number of turns? Does it
happen with 5 watts, 50 watts 100 or 1000 watts?

On 11/13/2016 8:47 PM, Robie Elms wrote:

> All,
>
> I have very limited experience with a K3 and I am helping a fellow club
> member get up and running on RTTY with his K3. Here is the setup:
>
> 1. We are using MMTTY in the AFSK mode
>
> 2. line in/out on the transceiver connected to the computer sound card mic
> and speaker input/output
>
> 3. PTT is via command the radio control port.
>
>
> The problem we are having is intermittent transmission of data. At times
> the set up works properly and then later when transmitting the K3 sends
> only a steady carrier. It appears that the computer is outputting audio
> tones to the K3 when this situation occurs. What are the potential causes
> of this problem. Any suggestions will be appreciated.
>
> Robie - AJ4F
> ______________________________________________________________
> 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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Richard Ferch-2

Re: K3 - AFSK

In reply to this post by Robie Elms-2

If the K3 is sending a steady carrier, by far the most likely explanation
is that it is in FSK D instead of AFSK A.

The data sub-mode is remembered per-band, so perhaps it is not set
correctly on all bands.

Another cause can be a logging program - for example, if you are using
MMTTY from within N1MM+, you have to make sure that the Mode control
setting for the mode sent to the radio is AFSK, not RTTY. RTTY in the mode
control selector in N1MM+ means FSK, and it will cause the radio to be put
into FSK D every time a QSY is commanded from N1MM+. A similar phenomenon
can occur with other logging or digital mode programs.

73,
Rich VE3KI

AJ4F wrote:

The problem we are having is intermittent transmission of data. At times
the set up works properly and then later when transmitting the K3 sends
only a steady carrier. It appears that the computer is outputting audio
tones to the K3 when this situation occurs. What are the potential causes
of this problem. Any suggestions will be appreciated.
______________________________________________________________
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Nr4c

Re: K3 - AFSK

In reply to this post by w0mu

Check software. I have noted my software switches sub-modes when making changes. It has to do with mode selection and mapping softwre modes tot he radio mode/sub-mode.

bill nr4c

> On Nov 13, 2016, at 11:40 PM, W0MU Mike Fatchett <[hidden email]> wrote:
>
> It doesn't solve you issue but the K3 is really good with FSK, ie clean.
>
> RF? have you put ferrites on the cables with a number of turns? Does it happen with 5 watts, 50 watts 100 or 1000 watts?
>
>
>
> On 11/13/2016 8:47 PM, Robie Elms wrote:
>> All,
>>
>> I have very limited experience with a K3 and I am helping a fellow club
>> member get up and running on RTTY with his K3. Here is the setup:
>>
>> 1. We are using MMTTY in the AFSK mode
>>
>> 2. line in/out on the transceiver connected to the computer sound card mic
>> and speaker input/output
>>
>> 3. PTT is via command the radio control port.
>>
>>
>> The problem we are having is intermittent transmission of data. At times
>> the set up works properly and then later when transmitting the K3 sends
>> only a steady carrier. It appears that the computer is outputting audio
>> tones to the K3 when this situation occurs. What are the potential causes
>> of this problem. Any suggestions will be appreciated.
>>
>> Robie - AJ4F
>> ______________________________________________________________
>> 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] <mailto:[hidden email]>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft <http://mailman.qth.net/mailman/listinfo/elecraft>
> Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm>
> Post: mailto:[hidden email] <mailto:[hidden email]>
>
> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> Please help support this email list: http://www.qsl.net/donate.html <http://www.qsl.net/donate.html>
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Robie Elms-2

Re: K3 - AFSK

All,

Thanks for your input and as a result I have several new ideas to
investigate.

Robie

On Mon, Nov 14, 2016 at 9:21 PM, Bill Conkling <[hidden email]> wrote:

> Check software. I have noted my software switches sub-modes when making
> changes. It has to do with mode selection and mapping softwre modes tot he
> radio mode/sub-mode.
>
> bill nr4c
>
> > On Nov 13, 2016, at 11:40 PM, W0MU Mike Fatchett <[hidden email]> wrote:
> >
> > It doesn't solve you issue but the K3 is really good with FSK, ie clean.
> >
> > RF? have you put ferrites on the cables with a number of turns? Does it
> happen with 5 watts, 50 watts 100 or 1000 watts?
> >
> >
> >
> > On 11/13/2016 8:47 PM, Robie Elms wrote:
> >> All,
> >>
> >> I have very limited experience with a K3 and I am helping a fellow club
> >> member get up and running on RTTY with his K3. Here is the setup:
> >>
> >> 1. We are using MMTTY in the AFSK mode
> >>
> >> 2. line in/out on the transceiver connected to the computer sound card
> mic
> >> and speaker input/output
> >>
> >> 3. PTT is via command the radio control port.
> >>
> >>
> >> The problem we are having is intermittent transmission of data. At
> times
> >> the set up works properly and then later when transmitting the K3 sends
> >> only a steady carrier. It appears that the computer is outputting audio
> >> tones to the K3 when this situation occurs. What are the potential
> causes
> >> of this problem. Any suggestions will be appreciated.
> >>
> >> Robie - AJ4F
> >> ______________________________________________________________
> >> 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] <mailto:[hidden email]>
> >
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft <
> http://mailman.qth.net/mailman/listinfo/elecraft>
> > Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm
> >
> > Post: mailto:[hidden email] <mailto:[hidden email]>
> >
> > This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> > Please help support this email list: http://www.qsl.net/donate.html <
> http://www.qsl.net/donate.html>
> > Message delivered to [hidden email] <mailto:[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]
>