ITTY to real Teletype (Rob Jarratt)       seven

Might want to consider an arduino TEENSY 4.1 , it can go down to 45.45 or 110  baud pretty easily,
AND convert from one to the other. Also try using an HF radio, someone could send you test code
ASCII to trigger what you what.




On Sun, Oct 6, 2024 at 8:50 AM <greenkeys-request@mailman.qth.net> wrote:
Send GreenKeys mailing list submissions to
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Today's Topics:

   1. Re: RTTY Journal help (Ralph Mowery)
   2. Re: RTTY Journal help (Harold Hallikainen)
   3. Re: Manual for HAL RKB-1 Keyboard? (Nick England)
   4. ITTY to real Teletype (David Wade)
   5. Re: [External] Re:  Manual for HAL RKB-1 Keyboard?
      (Jones, Douglas W)
   6. Re: ITTY to real Teletype (Jeffrey Golas)
   7. Re: ITTY to real Teletype (Rob Jarratt)
   8. Re: ITTY to real Teletype (Mike Douglas)
   9. Re: ITTY to real Teletype (Jeffrey Golas)
  10. ITTY to ASR33 (John Lawson)
  11. Re: ITTY to ASR33 (Jeffrey Golas)
  12. Xitex UDT170 60ma current loop interface (Eric Moore)


----------------------------------------------------------------------

Message: 1
Date: Fri, 4 Oct 2024 11:55:26 -0400
From: "Ralph Mowery" <rmowery42@charter.net>
To: "'Ken LoCasale'" <wa4mnt@gmail.com>,        <greenkeys@mailman.qth.net>
Subject: Re: [GreenKeys] RTTY Journal help
Message-ID: <004201db1675$d45ad970$7d108c50$@net>
Content-Type: text/plain;       charset="utf-8"

Try enlarging the schematic.  It seems easy to see if you enlarge the schematic to the point that you can only see a small part of the schematic.  The pins are laid out in order like 1,2,3,4,5,6,7.

Ralph  ku4pt



-----Original Message-----
From: greenkeys-bounces@mailman.qth.net [mailto:greenkeys-bounces@mailman.qth.net] On Behalf Of Ken LoCasale
Sent: Friday, October 04, 2024 11:37 AM
To: greenkeys@mailman.qth.net
Subject: [GreenKeys] RTTY Journal help

Gang,

I am trying to read an article from the RTTY Journal Dec. 1978, AFSK Generator about p.16, (attached). The generator uses an EXAR 2206 chip.
On the hand drawn schematic, I cannot read the pinouts, especially the lower part of the chip around C3. Can't read the numbers or if there are connections or pass throughs. On the schematic some obvious crossovers are dotted for connections, some obvious connections are not dotted. Right around C3 is the issue. Is anyone familiar with this circuit or have a better copy?

73,

ken - wa4mnt



------------------------------

Message: 2
Date: Fri, 4 Oct 2024 08:58:48 -0700
From: "Harold Hallikainen" <harold@w6iwi.org>
To: greenkeys@mailman.qth.net
Subject: Re: [GreenKeys] RTTY Journal help
Message-ID:
        <49dbc3abf31038bc676c0f4d065cc0bd.squirrel@hallikainen.org>
Content-Type: text/plain;charset=iso-8859-1

Have a look at
https://pdf.datasheetcatalog.com/datasheet/exar/XR2206v103.pdf#page=9 .

The XR2206 is an interesting chip! It starts with a triangle wave
generator. The frequency is determined by a capacitor and resistor. The
timing resistor is switched between two external resistors by the logic
level on pin 9. There is a sine shaper that converts the triangle wave to
a sine wave. There is an analog multiplier (balanced modulator) where the
sine or triangle wave is multiplied by an external voltage. It is a
balanced modulator in that the output phase flips as the modulating signal
passes through its midpoint. There is also an open collector square wave
output.

In the 1970s and 1980s, I used the XR2206 in several products. I used it
as an AFSK generator using Bell 202 tones. I used it as a linear FM
modulator to generate subcarriers for broadcast studio to transmitter
links (110 kHz) and FM broadcast (67 or 92 kHz). I used it as a frequency
converter where the multiplier is used as a balanced mixer to convert a
subcarrier frequency (one of those listed above) to 455 kHz where it went
through an IF amplifier with ceramic filters, then an FM demodulator based
on a ceramic discriminator. The oscillator function in the XR2206 was the
local oscillator for this frequency conversion. These are all used in
https://bh.hallikainen.org/uploads/HfDrc190.pdf .

Harold


On Fri, October 4, 2024 8:37 am, Ken LoCasale wrote:
> Gang,
>
> I am trying to read an article from the RTTY Journal Dec. 1978, AFSK
> Generator about p.16, (attached). The generator uses an EXAR 2206 chip.
> On the hand drawn schematic, I cannot read the pinouts, especially the
> lower part of the chip around C3. Can't read the numbers or if there are
> connections or pass throughs. On the schematic some obvious crossovers
> are dotted for connections, some obvious connections are not dotted.??
> Right around C3 is the issue. Is anyone familiar with this circuit or
> have a better copy?
>
> 73,
>
> ken - wa4mnt______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys@mailman.qth.net
>
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>> https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive:
>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive:
>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>> http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to harold@w6iwi.org


--
Not sent from an iPhone.


------------------------------

Message: 3
Date: Sat, 5 Oct 2024 12:26:41 -0400
From: Nick England <navy.radio@gmail.com>
To: W2HX <w2hx@w2hx.com>
Cc: Greenkeys <greenkeys@mailman.qth.net>
Subject: Re: [GreenKeys] Manual for HAL RKB-1 Keyboard?
Message-ID:
        <CAB55hNfBY_UQ26rPv6-EV91Njsan+=UK8EpFg34u6Asp0gjb6Q@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Thanks to Duncan and the AWA, the RKB-1 manual is now posted at
https://www.navy-radio.com/rtty/hal.htm

This keyboard and the Morse MKB-1 use a character coding scheme I have
never seen before. A wire from each key is threaded (or not) through a
series of toroids, one for each ?bit? in a character. Through is mark, skip
is space. Similarly for dot-dash in the Morse version. A pulse is fired
through the wire when a key is depressed and the secondary of the toroid
sets the corresponding bit in a shift register. Cool!

Nick England K4NYW
www.navy-radio.com


On Wed, Oct 2, 2024 at 4:50 PM W2HX <w2hx@w2hx.com> wrote:

> HAL had this TTY keyboard with a loop interface. Anyone have any
> documentation on this? Google was not fruitful.
>
>
>
>
>
> 73 Eugene W2HX
> My Youtube Channel: https://www.youtube.com/@w2hx/videos
>
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys@mailman.qth.net
>
> >>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> https://teletype.net/gksearch
> >>> 2002-to-present greenkeys archive:
> http://mailman.qth.net/pipermail/greenkeys/
> >>> 1998-to-2001 greenkeys archive:
> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to navy.radio@gmail.com
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------------------------------

Message: 4
Date: Sat, 5 Oct 2024 22:34:15 +0100
From: David Wade <dave.g4ugm@gmail.com>
To: "List, Green Keys Mailing" <GreenKeys@mailman.qth.net>
Subject: [GreenKeys] ITTY to real Teletype
Message-ID: <82993de2-0aa0-4d52-baf8-b8a471ef4041@gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed

I know there have been several USB to TTY boards produced, but what
software would you use to drive one of these from itty?

Dave

G4UGM



------------------------------

Message: 5
Date: Sun, 6 Oct 2024 00:23:07 +0000
From: "Jones, Douglas W" <douglas-w-jones@uiowa.edu>
To: Nick England <navy.radio@gmail.com>, W2HX <w2hx@w2hx.com>
Cc: Greenkeys <greenkeys@mailman.qth.net>
Subject: Re: [GreenKeys] [External] Re:  Manual for HAL RKB-1
        Keyboard?
Message-ID:
        <BN7PR04MB403638AFAACE0C57B9FB39F0A87C2@BN7PR04MB4036.namprd04.prod.outlook.com>

Content-Type: text/plain; charset="us-ascii"

From: Nick England [navy.radio@gmail.com] -- Saturday, October 5, 2024 11:26 AM

> This keyboard and the Morse MKB-1 use a character coding scheme I have never seen before.

I've heard this technology referred to as a braided-wire memory.  In Wikipedia, it's called core rope memory.

             Doug

------------------------------

Message: 6
Date: Sun, 6 Oct 2024 00:30:08 -0400
From: Jeffrey Golas <jeffg@junknet.net>
To: David Wade <dave.g4ugm@gmail.com>
Cc: Mailing List Green Keys <GreenKeys@mailman.qth.net>
Subject: Re: [GreenKeys] ITTY to real Teletype
Message-ID: <06B83B2F-D0EC-43C1-8C70-63F56BE0B40B@junknet.net>
Content-Type: text/plain; charset=utf-8

Normally the ITTY service is fed to a piece of hardware called a terminal unit (think modem). The service is streaming as RTTY which is normally sent over amateur radio.


Jeff

> On Oct 5, 2024, at 5:34?PM, David Wade <dave.g4ugm@gmail.com> wrote:
>
> ?I know there have been several USB to TTY boards produced, but what software would you use to drive one of these from itty?
>
> Dave
>
> G4UGM
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys@mailman.qth.net
>
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to jeffg@junknet.net


------------------------------

Message: 7
Date: Sun, 6 Oct 2024 08:18:16 +0100
From: "Rob Jarratt" <robert.jarratt@ntlworld.com>
To: "'Jeffrey Golas'" <jeffg@junknet.net>,      "'David Wade'"
        <dave.g4ugm@gmail.com>
Cc: 'Mailing List Green Keys' <GreenKeys@mailman.qth.net>
Subject: Re: [GreenKeys] ITTY to real Teletype
Message-ID: <001a01db17bf$e9de6460$bd9b2d20$@ntlworld.com>
Content-Type: text/plain;       charset="utf-8"

Hello,

Dave was asking this on my behalf, probably unaware that I am on this list too.

I have seen mention of ITTY Autostart etc and wondered about receiving all this on my ASR 33.

My thought was to see if I could set up a Raspberry Pi to receive the audio signal over the internet, translate that to ASCII and then send it to my ASR33. I already have the means to connect my ASR33 from software running on a Raspberry PI or a PC via reverse Telnet. The bit I am missing is what software (if any) there might be that I could run on a Raspberry Pi, or Windows that runs in the background (no GUI) to decode the ITTY audio signal. I am a software developer though, so I guess if such a thing doesn't exist then perhaps I can modify the MMTTY code that is published on GitHub.

Any pointers would be welcome.

Thanks

Rob

> -----Original Message-----
> From: greenkeys-bounces@mailman.qth.net <greenkeys-
> bounces@mailman.qth.net> On Behalf Of Jeffrey Golas
> Sent: 06 October 2024 05:30
> To: David Wade <dave.g4ugm@gmail.com>
> Cc: Mailing List Green Keys <GreenKeys@mailman.qth.net>
> Subject: Re: [GreenKeys] ITTY to real Teletype
>
> Normally the ITTY service is fed to a piece of hardware called a terminal unit
> (think modem). The service is streaming as RTTY which is normally sent over
> amateur radio.
>
>
> Jeff
>
> > On Oct 5, 2024, at 5:34?PM, David Wade <dave.g4ugm@gmail.com> wrote:
> >
> > ?I know there have been several USB to TTY boards produced, but what
> software would you use to drive one of these from itty?
> >
> > Dave
> >
> > G4UGM
> >
> > ______________________________________________________________
> > GreenKeys mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:GreenKeys@mailman.qth.net
> >
> >>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> >>>> https://teletype.net/gksearch 2002-to-present greenkeys archive:
> >>>> http://mailman.qth.net/pipermail/greenkeys/
> >>>> 1998-to-2001 greenkeys archive:
> >>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> >>>> http://comcents.com/tty/greenkeyssearch.html
> >
> > This list hosted by: http://www.qsl.net Please help support this email
> > list: http://www.qsl.net/donate.html Message delivered to
> > jeffg@junknet.net
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys@mailman.qth.net
>
> >>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> >>> https://teletype.net/gksearch 2002-to-present greenkeys archive:
> >>> http://mailman.qth.net/pipermail/greenkeys/
> >>> 1998-to-2001 greenkeys archive:
> >>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> >>> http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html Message
> delivered to robert.jarratt@ntlworld.com



------------------------------

Message: 8
Date: Sun, 6 Oct 2024 08:30:53 -0500
From: Mike Douglas <deramp5113@yahoo.com>
To: rob@jarratt.me.uk, Rob Jarratt <robert.jarratt@ntlworld.com>
Cc: Mailing List Green Keys <GreenKeys@mailman.qth.net>
Subject: Re: [GreenKeys] ITTY to real Teletype
Message-ID: <587C8F7D-67AB-447C-A927-ABB8E95F52AA@yahoo.com>
Content-Type: text/plain; charset="utf-8"

It?s not hard to demodulate the audio in software with an input capture timer on a microcontroller, Arduino, etc.  I?m not familiar enough with the pi hardware to know if it can do the same thing or not. Here are two devices I?ve made that decode FSK audio using software:

  https://deramp.com/model15_interface.html
  https://altairclone.com/cassette.html

If you want to start with either of these pieces of hardware, the Altair cassette interface board would be the easiest to connect directly to gpio pins on a pi. You?d have to write software to monitor the gpio data pin and do a ?reverse bit-bang? to receive the 45.5 baud data stream into 5-bit baudot. That could then easily be converted to ASCII and sent to your ASR 33 (assuming you have an RS-232 adapter for your 33).

If your ASR 33 is still connected by current loop, then it might be easier to update firmware in the model 15 interface board to convert the FSK it receives to 110 baud ASCII and drive the 33 directly.

Mike D

> On Oct 6, 2024, at 2:18 AM, Rob Jarratt via GreenKeys <greenkeys@mailman.qth.net> wrote:
>
> ?Hello,
>
> Dave was asking this on my behalf, probably unaware that I am on this list too.
>
> I have seen mention of ITTY Autostart etc and wondered about receiving all this on my ASR 33.
>
> My thought was to see if I could set up a Raspberry Pi to receive the audio signal over the internet, translate that to ASCII and then send it to my ASR33. I already have the means to connect my ASR33 from software running on a Raspberry PI or a PC via reverse Telnet. The bit I am missing is what software (if any) there might be that I could run on a Raspberry Pi, or Windows that runs in the background (no GUI) to decode the ITTY audio signal. I am a software developer though, so I guess if such a thing doesn't exist then perhaps I can modify the MMTTY code that is published on GitHub.
>
> Any pointers would be welcome.
>
> Thanks
>
> Rob
>
>> -----Original Message-----
>> From: greenkeys-bounces@mailman.qth.net <greenkeys-
>> bounces@mailman.qth.net> On Behalf Of Jeffrey Golas
>> Sent: 06 October 2024 05:30
>> To: David Wade <dave.g4ugm@gmail.com>
>> Cc: Mailing List Green Keys <GreenKeys@mailman.qth.net>
>> Subject: Re: [GreenKeys] ITTY to real Teletype
>>
>> Normally the ITTY service is fed to a piece of hardware called a terminal unit
>> (think modem). The service is streaming as RTTY which is normally sent over
>> amateur radio.
>>
>>
>> Jeff
>>
>>>> On Oct 5, 2024, at 5:34?PM, David Wade <dave.g4ugm@gmail.com> wrote:
>>>
>>> ?I know there have been several USB to TTY boards produced, but what
>> software would you use to drive one of these from itty?
>>>
>>> Dave
>>>
>>> G4UGM
>>>
>>> ______________________________________________________________
>>> GreenKeys mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:GreenKeys@mailman.qth.net
>>>
>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>>> https://teletype.net/gksearch 2002-to-present greenkeys archive:
>>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>>> 1998-to-2001 greenkeys archive:
>>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>>> http://comcents.com/tty/greenkeyssearch.html
>>>
>>> This list hosted by: http://www.qsl.net Please help support this email
>>> list: http://www.qsl.net/donate.html Message delivered to
>>> jeffg@junknet.net
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys@mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>> https://teletype.net/gksearch 2002-to-present greenkeys archive:
>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive:
>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>> http://comcents.com/tty/greenkeyssearch.html
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html Message
>> delivered to robert.jarratt@ntlworld.com
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys@mailman.qth.net
>
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to deramp5113@yahoo.com
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------------------------------

Message: 9
Date: Sun, 6 Oct 2024 10:14:50 -0400
From: Jeffrey Golas <jeffg@junknet.net>
To: rob@jarratt.me.uk
Cc: Mailing List Green Keys <GreenKeys@mailman.qth.net>
Subject: Re: [GreenKeys] ITTY to real Teletype
Message-ID: <8D4E1381-AC48-4859-A66A-AA296559C73F@junknet.net>
Content-Type: text/plain; charset=utf-8

Vlc to get the stream, minimodem to decode.

Jeff

> On Oct 6, 2024, at 3:18?AM, Rob Jarratt <robert.jarratt@ntlworld.com> wrote:
>
> ?Hello,
>
> Dave was asking this on my behalf, probably unaware that I am on this list too.
>
> I have seen mention of ITTY Autostart etc and wondered about receiving all this on my ASR 33.
>
> My thought was to see if I could set up a Raspberry Pi to receive the audio signal over the internet, translate that to ASCII and then send it to my ASR33. I already have the means to connect my ASR33 from software running on a Raspberry PI or a PC via reverse Telnet. The bit I am missing is what software (if any) there might be that I could run on a Raspberry Pi, or Windows that runs in the background (no GUI) to decode the ITTY audio signal. I am a software developer though, so I guess if such a thing doesn't exist then perhaps I can modify the MMTTY code that is published on GitHub.
>
> Any pointers would be welcome.
>
> Thanks
>
> Rob
>
>> -----Original Message-----
>> From: greenkeys-bounces@mailman.qth.net <greenkeys-
>> bounces@mailman.qth.net> On Behalf Of Jeffrey Golas
>> Sent: 06 October 2024 05:30
>> To: David Wade <dave.g4ugm@gmail.com>
>> Cc: Mailing List Green Keys <GreenKeys@mailman.qth.net>
>> Subject: Re: [GreenKeys] ITTY to real Teletype
>>
>> Normally the ITTY service is fed to a piece of hardware called a terminal unit
>> (think modem). The service is streaming as RTTY which is normally sent over
>> amateur radio.
>>
>>
>> Jeff
>>
>>>> On Oct 5, 2024, at 5:34?PM, David Wade <dave.g4ugm@gmail.com> wrote:
>>>
>>> ?I know there have been several USB to TTY boards produced, but what
>> software would you use to drive one of these from itty?
>>>
>>> Dave
>>>
>>> G4UGM
>>>
>>> ______________________________________________________________
>>> GreenKeys mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:GreenKeys@mailman.qth.net
>>>
>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>>> https://teletype.net/gksearch 2002-to-present greenkeys archive:
>>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>>> 1998-to-2001 greenkeys archive:
>>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>>> http://comcents.com/tty/greenkeyssearch.html
>>>
>>> This list hosted by: http://www.qsl.net Please help support this email
>>> list: http://www.qsl.net/donate.html Message delivered to
>>> jeffg@junknet.net
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys@mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>> https://teletype.net/gksearch 2002-to-present greenkeys archive:
>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive:
>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>> http://comcents.com/tty/greenkeyssearch.html
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html Message
>> delivered to robert.jarratt@ntlworld.com
>


------------------------------

Message: 10
Date: Sun, 6 Oct 2024 14:28:39 +0000
From: John Lawson <john@tubetestingpros.com>
To: greenkeys <greenkeys@mailman.qth.net>
Subject: [GreenKeys] ITTY to ASR33
Message-ID:
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  I hve used an AEA PK-232 to do this. The 33 is connected to the PK-232's console port, which is configured for 110 ASCII. (The 232 has an 'autodetect' feature which will set itself up for the correct terminal device)
The the 232 is commanded into Baudot mode (By typing 'BA' on the 33) and incoming AFSK will appear on the console device. It's quite wierd to have the ASR33 clacking away at 45 baud - less than half it's "normal" speed - but it works well and I have used it at several demos I've run with Baudot and ASCII machinery running in parallel at the same time.  I've also decoded Morse this way.

I know that there were several other similar devices available which also used an RS-232 / ASCII console and decoded various signal on their audio inputs. The PK-232 is the one I'm familiar with and seems to work well.  And the are not hard to find - I've had several of them over the years. Documentation is also archived in various places.  Look for HAL, Heathkit, Kantronics, etc.

Finally one could use a USB - to Serial converter and run MTTY, FLDIGI, or similar, and send the output to the 'serial' port ad thus to the ASR33


Cheers
John KB6SCO
Carson City
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Message: 11
Date: Sun, 6 Oct 2024 11:29:49 -0400
From: Jeffrey Golas <jeffg@junknet.net>
To: John Lawson <john@tubetestingpros.com>
Cc: greenkeys <greenkeys@mailman.qth.net>
Subject: Re: [GreenKeys] ITTY to ASR33
Message-ID: <EACD324F-BEFC-49BF-B633-E472BA494C8E@junknet.net>
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I keep forgetting about these. They can also be used in pairs as a converter; send ASCII in, have it talk RTTY to another (or a TU) as an ascii to baudot adapter.

> On Oct 6, 2024, at 10:28?AM, John Lawson <john@tubetestingpros.com> wrote:
>
> ?
> 
>   I hve used an AEA PK-232 to do this. The 33 is connected to the PK-232?s console port, which is configured for 110 ASCII. (The 232 has an ?autodetect? feature which will set itself up for the correct terminal device)
> The the 232 is commanded into Baudot mode (By typing ?BA? on the 33) and incoming AFSK will appear on the console device. It?s quite wierd to have the ASR33 clacking away at 45 baud ? less than half it?s ?normal? speed ? but it works well and I have used it at several demos I?ve run with Baudot and ASCII machinery running in parallel at the same time.  I?ve also decoded Morse this way.
> 
> I know that there were several other similar devices available which also used an RS-232 / ASCII console and decoded various signal on their audio inputs. The PK-232 is the one I?m familiar with and seems to work well.  And the are not hard to find ? I?ve had several of them over the years. Documentation is also archived in various places.  Look for HAL, Heathkit, Kantronics, etc.
> 
> Finally one could use a USB ? to Serial converter and run MTTY, FLDIGI, or similar, and send the output to the ?serial? port ad thus to the ASR33
> 
> 
> Cheers
> John KB6SCO
> Carson City
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Message: 12
Date: Sun, 6 Oct 2024 10:47:08 -0500
From: Eric Moore <mooreericnyc@gmail.com>
To: Greenkeys <greenkeys@mailman.qth.net>
Subject: [GreenKeys] Xitex UDT170 60ma current loop interface
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Anyone know what the pinout for this is? I gather from advertisements I
found it should be 60ma.

-Eric
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