[Elecraft] Sending AFSK RTTY

[Bob McGraw K4TAX]

If one wishes to run FT-8 that is a USB mode and DATA A conforms to 
that.   If you wish to run RTTY i.e. AFSK then use the AFSK A mode and 
45 BPS.  The AFSK A is LSB mode which conforms to the RTTY protocol.

Set-up between the radio and computer is accomplished with a single USB 
cable.  I use WSJT-X for FT-8 and MMTTY for AFSK.  Both support CAT 
control for frequency and mode.    When you use DATA A or AFSK A the 
compression and EQ for both RX and TX are negated and you do not have to 
make any changes to your SSB settings.  As Barry said, the audio level 
from the computer and audio level adjusted in the software application 
along with the MIC control on the front which, in those modes, are 
actually LINE Gain.  The ALC bar should show 4 solid and the 5th 
flashing.  Control the actual power output is accomplished  by using the 
PWR control on the radio and NOT in the software or computer.

73

Bob, K4TAX


On 3/19/2019 8:23 PM, Barry wrote:
> Peter,
>     I'm not that familiar with Winwarbler, but I do run AFSK when 
> using RTTY. You could use DATA A on the K3s or AFSK. I prefer to use 
> the AFSK mode as it appear to work better than just using DATA A. The 
> set up should be about the same as you are using for FT8 using the 
> radio's built in sound card for the software you use; I prefer FLDIGI 
> just because.
>
>     The K3s does do FSK, but I'm not sure there is a real advantage 
> over running in the AFSK mode with some digital software. The data 
> mode as you call it is DATA A on the radio. It means you can feed the 
> output of some digital software into the radio and use any available 
> bandwidth. It also turns off the equalizers and compressor. AFSK has a 
> filter for each tone.
>
>     I'm not sure why you have had some much difficulty as I would 
> estimate it shouldn't take more than one day. ;-)
>
>     As you have a K3s, the set up really shouldn't be a lot of 
> trouble. Start by downloading FLDIGI and connecting the radio using 
> the USB connector.  This allows both control of the radio and audio in 
> and out. Set the sound card in FLDIGI to USB CODEC line in and speaker 
> out. The radio will reflect a com port that will be used for control, 
> use it at 38,400 8N2. Now you're set to go. Use the mic control on the 
> front of the radio to set the level for the transmitter such that ALC 
> will show 4 bars and a flickering 5th. The power level should be set 
> with the knob that controls power. This should be how you set up for 
> FT8 using WSJT-X. All you need to do is set op mode in FLDIGI and go. 
> Have fun!
>
> 73,
> Barry
> K3NDM
> .
> ------ Original Message ------
> From: "Peter Dougherty" <lists at w2irt.net>
> To: Elecraft at mailman.qth.net
> Sent: 3/19/2019 8:59:17 PM
> Subject: [Elecraft] Sending AFSK RTTY
>
>> I haven't sent AFSK RTTY in almost 18 years so I'm not sure how I 
>> should set
>> my K3s up for it. I will be using it with DX Labs WinWarbler 
>> exclusively (I
>> don't do RTTY contesting, so no need to get it working with N1MM). I 
>> have
>> the radio setup for USB communication exclusively. Before this I had a
>> MicroKeyer-II and was sending FSK. Given the rise of FT8 I doubt I'll be
>> doing much RTTY anymore, but I still need to have it available just 
>> in case.
>>
>> Using WinWarbler, I don't see any option to use a data mode for RTTY, 
>> just
>> LSB (again, we're talking AFSK now). Isn't there a data mode built 
>> into the
>> K3s for RTTY? Or is that just for FSK? Or is it a case of only using 
>> data
>> mode for one (and only one) data format? At the moment, I have the radio
>> using Data mode for FT8.
>>
>> Sorry for the confusion-it's been three days of trying to find the right
>> settings for everything, with only very limited success. Thanks as 
>> always.
>>
>>
>> ----------------------------------------------------
>>
>> Regards,
>> Peter Dougherty
>>
>>
>>
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