RTTY with K3

[Elecraft mailing list]

Trying to set up RTTY on the K3. Receive working fine using MMTTY. Hooked USB from computer through USB/Serial converter and plugged through an opto-isolator adapter to the ACC plug for FSK. It doesn't key the rig and no keying is coming through. I've tried 2 different USB/Serial converters. Seems I read somewhere there's a special one (expensive) that is the only one that will work?

Tom, K4IE
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[Joe Subich, W4TV-4]

Are you trying to use the USB to serial converter as a serial port
(COM# in MMTTY's FSK & PTT Port) or are you using EXTFSK/EXTFSK64?

I know of only one manufacturer of USB to serial converter ("Edgeport")
that works at the serial rate required for standard RTTY.

What version of MMMTTY are you trying to set up?   I recommend you
download the most recent version of MMTTY (1.70K) and study the Help
file information on FSK (with EXTFSK/EXTFSK64).

73,

    ... Joe, W4TV


On 6/22/2017 5:01 PM, Tom Fitzpatrick via Elecraft wrote:

> Trying to set up RTTY on the K3. Receive working fine using MMTTY. Hooked USB from computer through USB/Serial converter and plugged through an opto-isolator adapter to the ACC plug for FSK. It doesn't key the rig and no keying is coming through. I've tried 2 different USB/Serial converters. Seems I read somewhere there's a special one (expensive) that is the only one that will work?
>
> Tom, K4IE
> ______________________________________________________________
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[Tox]

TrippLite Keyspan model USA-19HS should work, is about $25, has solid
drivers for both windows and mac, and can help you program arduinos if that
becomes interesting.

Tox
AD6YT

On Thu, Jun 22, 2017 at 2:39 PM, Joe Subich, W4TV <[hidden email]> wrote:

>
> Are you trying to use the USB to serial converter as a serial port
> (COM# in MMTTY's FSK & PTT Port) or are you using EXTFSK/EXTFSK64?
>
> I know of only one manufacturer of USB to serial converter ("Edgeport")
> that works at the serial rate required for standard RTTY.
>
> What version of MMMTTY are you trying to set up?   I recommend you
> download the most recent version of MMTTY (1.70K) and study the Help
> file information on FSK (with EXTFSK/EXTFSK64).
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 6/22/2017 5:01 PM, Tom Fitzpatrick via Elecraft wrote:
>
>> Trying to set up RTTY on the K3. Receive working fine using MMTTY. Hooked
>> USB from computer through USB/Serial converter and plugged through an
>> opto-isolator adapter to the ACC plug for FSK. It doesn't key the rig and
>> no keying is coming through. I've tried 2 different USB/Serial converters.
>> Seems I read somewhere there's a special one (expensive) that is the only
>> one that will work?
>>
>> Tom, K4IE
>> ______________________________________________________________
>> 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
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> Post: mailto:[hidden email]
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> 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]
>

--
Scott Small
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[Don Wilhelm]

Tom,

Many USB to serial adapters do not work at slower speeds, and the FSK
input to the K3 is at a slow speed (the baud rate for RTTY is slow).

The Edgeport USB to serial converters seem to work well at any speed (I
have the 4 port converter).  Note that there is an apparent difference
between "converter" and "adapter".

If you do not wish to purchase another adapter (converter), you might
want to set the K3 up for AFSK-A and use your soundcard to both the K3
LINE IN and LINE OUT - just set the audio levels as you would for any
other soundcard data mode - 4 bars solid on the K3 ALC meter with the
5th bar flashing.

Once the audio levels are set, you should not have to touch them during
operation.  An external soundcard is best as long as it is not set to be
the default soundcard in your computer - if it is, turn off any sounds
from your Operating System.

You do have a soundcard that you are using for the RTTY decode, use the
same one.

AFSK-A is as good as FSK-D, and may give even better IMD performance.

73,
Don W3FPR

On 6/22/2017 5:01 PM, Tom Fitzpatrick via Elecraft wrote:
> Trying to set up RTTY on the K3. Receive working fine using MMTTY. Hooked USB from computer through USB/Serial converter and plugged through an opto-isolator adapter to the ACC plug for FSK. It doesn't key the rig and no keying is coming through. I've tried 2 different USB/Serial converters. Seems I read somewhere there's a special one (expensive) that is the only one that will work?
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