K3 RTTY MODE

[W1KSZ]

Does anyone have any idea when they will upgrade to Keyboard operation
for RTTY ? Now, I mean using real FSK, not this sound card AFSK stuff.

In some radios, AFSK requires you to use the SSB mode, which does not
allow filter selection. The Yaesu does.

73, Dick, W1KSZ
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[Don Wilhelm-4]

Dick,

Rather than using SSB mode for data, use the DATA modes, it is less
troublesome and compression is set to zero automatically..
Use DATA A mode for soundcard digital modes, or AFSK A for soundcard
RTTY.  See page 31 of the K3 manual.  With good carrier balance, an AFSK
signal is equal to an FSK signal.  The K3 AFSK A data mode sets the mark
frequency in the VFO (rather than the carrier frequency), and allows use
of the dual passband filter which is designed for RTTY use.
The narrow roofing filters and the full range of DSP filters can be used
for DATA modes if you configure the narrow filters for receive in that
mode.  Transmit must always use the 2.7 or 2.8 kHz filters, but the K3
figures out the arithmetic involved.

If you wish to use the FSK input to the K3, you will have to provide a
level translation and drive the FSK input on the ACC connector.  MMTTY
has methods of activating the FSK input.

73,
Don W3FPR

Richard W. Solomon wrote:
> Does anyone have any idea when they will upgrade to Keyboard operation
> for RTTY ? Now, I mean using real FSK, not this sound card AFSK stuff.
>
> In some radios, AFSK requires you to use the SSB mode, which does not
> allow filter selection. The Yaesu does.
>
> 73, Dick, W1KSZ
>  
>
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I have found the AFSK stuff works quite well with the K3.  I am using the SignaLink USB with N1MM logger and have made a couple of thousand QSOs on RTTY.  I have no issue with the RX because you can used any filter in AFSK Data mode.  Any filter.  So, you do not use the SSB filter at all.  I used my 500 Hz filter and knock it down to 300 Hz with the DSP and works great!  So, this is not an issue.

Lee - K0WA


The New Kansas QSO Party - August 29, Sat 9am-9pm and August 30 Sun 9am-3pm CDT
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--- On Mon, 3/23/09, Richard W. Solomon <[hidden email]> wrote:
From: Richard W. Solomon <[hidden email]>
Subject: [Elecraft] K3 RTTY MODE
To: [hidden email]
Date: Monday, March 23, 2009, 12:12 PM

Does anyone have any idea when they will upgrade to Keyboard operation
for RTTY ? Now, I mean using real FSK, not this sound card AFSK stuff.

In some radios, AFSK requires you to use the SSB mode, which does not
allow filter selection. The Yaesu does.

73, Dick, W1KSZ
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[Iain MacDonnell - N6ML-2]

Richard W. Solomon wrote:
> Does anyone have any idea when they will upgrade to Keyboard operation
> for RTTY ? Now, I mean using real FSK, not this sound card AFSK stuff.

If you're talking about plugging a keyboard directly into the K3, I
don't think there's any plan to implement that.

"Real" FSK is already available via the accessory port, but the
keyboard-to-FSK has to be done externally (commonly by software like
MMTTY).

K1EL's K40 interface kit apparently allows use of a PS/2 keyboard to
generate FSK without a computer, but his website still says it's out
of stock.


> In some radios, AFSK requires you to use the SSB mode, which does not
> allow filter selection. The Yaesu does.

Not sure if there's a question there? The K3 *does* allow filtering
(including dual-passband) in "AFSK A" mode, as well as in "FSK D" mode.

     ~Iain / N6ML

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[K1LI]

Don,

I am a "digital mode neophyte." Is it possible - or, is it considered to be
too much of a kludge - to receive a digital mode (be it PSK or RTTY) via PC
soundcard and send CW to the K3 for translation into the digital mode? It
seems that this would avoid some of the pitfalls associated with using a PC
to generate "radio quality" audio. Do you know if any of the popular
programs does this?

Thanks,

Brian K1LI

On Mon, Mar 23, 2009 at 3:25 PM, Don Wilhelm <[hidden email]> wrote:

> Dick,
>
> Rather than using SSB mode for data, use the DATA modes, it is less
> troublesome and compression is set to zero automatically..
> Use DATA A mode for soundcard digital modes, or AFSK A for soundcard
> RTTY.  See page 31 of the K3 manual.  With good carrier balance, an AFSK
> signal is equal to an FSK signal.  The K3 AFSK A data mode sets the mark
> frequency in the VFO (rather than the carrier frequency), and allows use
> of the dual passband filter which is designed for RTTY use.
> The narrow roofing filters and the full range of DSP filters can be used
> for DATA modes if you configure the narrow filters for receive in that
> mode.  Transmit must always use the 2.7 or 2.8 kHz filters, but the K3
> figures out the arithmetic involved.
>
> If you wish to use the FSK input to the K3, you will have to provide a
> level translation and drive the FSK input on the ACC connector.  MMTTY
> has methods of activating the FSK input.
>
> 73,
> Don W3FPR
>
> Richard W. Solomon wrote:
> > Does anyone have any idea when they will upgrade to Keyboard operation
> > for RTTY ? Now, I mean using real FSK, not this sound card AFSK stuff.
> >
> > In some radios, AFSK requires you to use the SSB mode, which does not
> > allow filter selection. The Yaesu does.
> >
> > 73, Dick, W1KSZ
> >
> >
> ______________________________________________________________
> 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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>

... [show rest of quote]

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[Doug Faunt N6TQS [phone]]

And as has been pointed out by one of the G's here, a PICAXE-18X can be
VERY easily programmed to use a PS2 keyboard to send FSK, PSK and CW,
using the KY command, when connected to the serial port.

I've still got the K40 that I used with my IC756PRO once upon a time
in a similar role.

I can give further details if anyone is interested.

73, doug

   Date: Mon, 23 Mar 2009 12:42:47 -0700
   From: Iain MacDonnell - N6ML <[hidden email]>

   Richard W. Solomon wrote:
   > Does anyone have any idea when they will upgrade to Keyboard operation
   > for RTTY ? Now, I mean using real FSK, not this sound card AFSK stuff.

   If you're talking about plugging a keyboard directly into the K3, I
   don't think there's any plan to implement that.

   "Real" FSK is already available via the accessory port, but the
   keyboard-to-FSK has to be done externally (commonly by software like
   MMTTY).

   K1EL's K40 interface kit apparently allows use of a PS/2 keyboard to
   generate FSK without a computer, but his website still says it's out
   of stock.
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[Greg - AB7R]

Cannot do this as the software sending CW would be straight CW being sent to the CW
input jack.  PSK-D and FSK-D from CW is only capable from the paddles input.

But it only takes a very simple interface using a transistor and resistor using the
circuit described on the AA5AU website from a COM port to pins 1 and 5 on the ACCY
connector.

-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065


On Mon Mar 23 13:16 , Brian Machesney  sent:

>Don,
>
>I am a "digital mode neophyte." Is it possible - or, is it considered to be
>too much of a kludge - to receive a digital mode (be it PSK or RTTY) via PC
>soundcard and send CW to the K3 for translation into the digital mode? It
>seems that this would avoid some of the pitfalls associated with using a PC
>to generate "radio quality" audio. Do you know if any of the popular
>programs does this?
>
>Thanks,
>
>Brian K1LI
>
>On Mon, Mar 23, 2009 at 3:25 PM, Don Wilhelm [hidden email]> wrote:
>
>> Dick,
>>
>> Rather than using SSB mode for data, use the DATA modes, it is less
>> troublesome and compression is set to zero automatically..
>> Use DATA A mode for soundcard digital modes, or AFSK A for soundcard
>> RTTY.  See page 31 of the K3 manual.  With good carrier balance, an AFSK
>> signal is equal to an FSK signal.  The K3 AFSK A data mode sets the mark
>> frequency in the VFO (rather than the carrier frequency), and allows use
>> of the dual passband filter which is designed for RTTY use.
>> The narrow roofing filters and the full range of DSP filters can be used
>> for DATA modes if you configure the narrow filters for receive in that
>> mode.  Transmit must always use the 2.7 or 2.8 kHz filters, but the K3
>> figures out the arithmetic involved.
>>
>> If you wish to use the FSK input to the K3, you will have to provide a
>> level translation and drive the FSK input on the ACC connector.  MMTTY
>> has methods of activating the FSK input.
>>
>> 73,
>> Don W3FPR
>>
>> Richard W. Solomon wrote:
>> > Does anyone have any idea when they will upgrade to Keyboard operation
>> > for RTTY ? Now, I mean using real FSK, not this sound card AFSK stuff.
>> >
>> > In some radios, AFSK requires you to use the SSB mode, which does not
>> > allow filter selection. The Yaesu does.
>> >
>> > 73, Dick, W1KSZ
>> >
>> >
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: [hidden email]','','','')">[hidden email]
>>
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>>
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>
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... [show rest of quote]

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[Don Wilhelm-4]

Brian,

Do not be put off by those who believe that "radio quality" audio cannot
be generated by a soundcard.  That may have been true with cheap
soundcards a long time ago, but most soundcards available now will
produce pure audio tones with very little distortion - so unless you
have a totally antique computer soundcard, it will do AFSK RTTY or PSK
just fine.  Many are doing it, and I dare say that the problems are not
with the soundcard itself, but with some hams overdriving the audio
input of the transceiver.

You have already heard that your proposed solution will not work - but
there is a 'close relative' that will generate RTTY, PSK or CW from
keyboard input and send it to the K3.  Look at the K3Utility Terminal
tab.  Reception is on the screen and you would receive in PSK D or FSK D
data modes.  It is not exotic, but it works FB as a quick solution -
tune the desired signal with a narrow filter.

Other computer software packages will do all that the K3Utility Terminal
will do and a lot more too, but they do use the soundcard for both
transmit and receive.  DigiPan is one of the easiest, Ham Radio Deluxe
with DM780 is one of my favorites and is free - others prefer the full
featured MixW.

73,
Don W3FPR

Brian Machesney wrote:

> Don,
>
> I am a "digital mode neophyte." Is it possible - or, is it considered to be
> too much of a kludge - to receive a digital mode (be it PSK or RTTY) via PC
> soundcard and send CW to the K3 for translation into the digital mode? It
> seems that this would avoid some of the pitfalls associated with using a PC
> to generate "radio quality" audio. Do you know if any of the popular
> programs does this?
>
> Thanks,
>
> Brian K1LI
>
> On Mon, Mar 23, 2009 at 3:25 PM, Don Wilhelm <[hidden email]> wrote:
>
>  
>> Dick,
>>
>> Rather than using SSB mode for data, use the DATA modes, it is less
>> troublesome and compression is set to zero automatically..
>> Use DATA A mode for soundcard digital modes, or AFSK A for soundcard
>> RTTY.  See page 31 of the K3 manual.  With good carrier balance, an AFSK
>> signal is equal to an FSK signal.  The K3 AFSK A data mode sets the mark
>> frequency in the VFO (rather than the carrier frequency), and allows use
>> of the dual passband filter which is designed for RTTY use.
>> The narrow roofing filters and the full range of DSP filters can be used
>> for DATA modes if you configure the narrow filters for receive in that
>> mode.  Transmit must always use the 2.7 or 2.8 kHz filters, but the K3
>> figures out the arithmetic involved.
>>
>> If you wish to use the FSK input to the K3, you will have to provide a
>> level translation and drive the FSK input on the ACC connector.  MMTTY
>> has methods of activating the FSK input.
>>
>> 73,
>> Don W3FPR
>>
>> Richard W. Solomon wrote:
>>    
>>> Does anyone have any idea when they will upgrade to Keyboard operation
>>> for RTTY ? Now, I mean using real FSK, not this sound card AFSK stuff.
>>>
>>> In some radios, AFSK requires you to use the SSB mode, which does not
>>> allow filter selection. The Yaesu does.
>>>
>>> 73, Dick, W1KSZ
>>>
>>>
>>>      
>> ______________________________________________________________
>> Elecraft mailing list
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>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>    
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... [show rest of quote]

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[David Fleming-2]

For those interested in playing with microcontrollers, there is a very easy way to use an Atmel AVR to convert the AFSK from your favorite RTTY software to true FSK - and provide PTT as well.

A few weeks ago, Kok Chen, W7AY, and I had a discussion about Atmel AVR microcontrollers. I told him I had always wanted to learn how to do it but couldn't come up with a good idea for a project to get me started. He directed me to this project developed by Doug Hall, K4DSP.

http://k4dsp.homeip.net/~doug/regenerator/

This sparked my interest, and I decided to build one. Just finished it this weekend. It works like a charm with cocoaModem and the K3 - and I got my feet wet with microcontroller programming.

David, W4SMT





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