[GreenKeys] GreenKeys Digest, Vol 249, Issue 4

Sun Oct 6 14:26:46 EDT 2024

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 at mailman.qth.net> wrote:

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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 at charter.net>
> To: "'Ken LoCasale'" <wa4mnt at gmail.com>,        <greenkeys at 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 at mailman.qth.net [mailto:
> greenkeys-bounces at mailman.qth.net] On Behalf Of Ken LoCasale
> Sent: Friday, October 04, 2024 11:37 AM
> To: greenkeys at 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 at w6iwi.org>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] RTTY Journal help
> Message-ID:
>         <49dbc3abf31038bc676c0f4d065cc0bd.squirrel at 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 at 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 at w6iwi.org
>
>
> --
> Not sent from an iPhone.
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 5 Oct 2024 12:26:41 -0400
> From: Nick England <navy.radio at gmail.com>
> To: W2HX <w2hx at w2hx.com>
> Cc: Greenkeys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Manual for HAL RKB-1 Keyboard?
> Message-ID:
>         <CAB55hNfBY_UQ26rPv6-EV91Njsan+=
> UK8EpFg34u6Asp0gjb6Q at 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 at 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 at 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 at gmail.com
> -------------- next part --------------
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> >
>
> ------------------------------
>
> Message: 4
> Date: Sat, 5 Oct 2024 22:34:15 +0100
> From: David Wade <dave.g4ugm at gmail.com>
> To: "List, Green Keys Mailing" <GreenKeys at mailman.qth.net>
> Subject: [GreenKeys] ITTY to real Teletype
> Message-ID: <82993de2-0aa0-4d52-baf8-b8a471ef4041 at 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 at uiowa.edu>
> To: Nick England <navy.radio at gmail.com>, W2HX <w2hx at w2hx.com>
> Cc: Greenkeys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] [External] Re:  Manual for HAL RKB-1
>         Keyboard?
> Message-ID:
>         <
> BN7PR04MB403638AFAACE0C57B9FB39F0A87C2 at BN7PR04MB4036.namprd04.prod.outlook.com
> >
>
> Content-Type: text/plain; charset="us-ascii"
>
> From: Nick England [navy.radio at 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 at junknet.net>
> To: David Wade <dave.g4ugm at gmail.com>
> Cc: Mailing List Green Keys <GreenKeys at mailman.qth.net>
> Subject: Re: [GreenKeys] ITTY to real Teletype
> Message-ID: <06B83B2F-D0EC-43C1-8C70-63F56BE0B40B at 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 at 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 at 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 at junknet.net
>
>
> ------------------------------
>
> Message: 7
> Date: Sun, 6 Oct 2024 08:18:16 +0100
> From: "Rob Jarratt" <robert.jarratt at ntlworld.com>
> To: "'Jeffrey Golas'" <jeffg at junknet.net>,      "'David Wade'"
>         <dave.g4ugm at gmail.com>
> Cc: 'Mailing List Green Keys' <GreenKeys at mailman.qth.net>
> Subject: Re: [GreenKeys] ITTY to real Teletype
> Message-ID: <[email protected]>
> 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 at mailman.qth.net <greenkeys-
> > bounces at mailman.qth.net> On Behalf Of Jeffrey Golas
> > Sent: 06 October 2024 05:30
> > To: David Wade <dave.g4ugm at gmail.com>
> > Cc: Mailing List Green Keys <GreenKeys at 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 at 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 at 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 at junknet.net
> > ______________________________________________________________
> > GreenKeys mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:GreenKeys at 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 at ntlworld.com
>
>
>
> ------------------------------
>
> Message: 8
> Date: Sun, 6 Oct 2024 08:30:53 -0500
> From: Mike Douglas <deramp5113 at yahoo.com>
> To: rob at jarratt.me.uk, Rob Jarratt <robert.jarratt at ntlworld.com>
> Cc: Mailing List Green Keys <GreenKeys at mailman.qth.net>
> Subject: Re: [GreenKeys] ITTY to real Teletype
> Message-ID: <587C8F7D-67AB-447C-A927-ABB8E95F52AA at 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 at 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 at mailman.qth.net <greenkeys-
> >> bounces at mailman.qth.net> On Behalf Of Jeffrey Golas
> >> Sent: 06 October 2024 05:30
> >> To: David Wade <dave.g4ugm at gmail.com>
> >> Cc: Mailing List Green Keys <GreenKeys at 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 at 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 at 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 at junknet.net
> >> ______________________________________________________________
> >> GreenKeys mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:GreenKeys at 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 at ntlworld.com
> >
> > ______________________________________________________________
> > GreenKeys mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:GreenKeys at 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 at yahoo.com
> -------------- next part --------------
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> http://mailman.qth.net/pipermail/greenkeys/attachments/20241006/d8b3bb98/attachment-0001.html
> >
>
> ------------------------------
>
> Message: 9
> Date: Sun, 6 Oct 2024 10:14:50 -0400
> From: Jeffrey Golas <jeffg at junknet.net>
> To: rob at jarratt.me.uk
> Cc: Mailing List Green Keys <GreenKeys at mailman.qth.net>
> Subject: Re: [GreenKeys] ITTY to real Teletype
> Message-ID: <8D4E1381-AC48-4859-A66A-AA296559C73F at 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 at 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 at mailman.qth.net <greenkeys-
> >> bounces at mailman.qth.net> On Behalf Of Jeffrey Golas
> >> Sent: 06 October 2024 05:30
> >> To: David Wade <dave.g4ugm at gmail.com>
> >> Cc: Mailing List Green Keys <GreenKeys at 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 at 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 at 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 at junknet.net
> >> ______________________________________________________________
> >> GreenKeys mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:GreenKeys at 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 at ntlworld.com
> >
>
>
> ------------------------------
>
> Message: 10
> Date: Sun, 6 Oct 2024 14:28:39 +0000
> From: John Lawson <john at tubetestingpros.com>
> To: greenkeys <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] ITTY to ASR33
> Message-ID:
>         <
> CH3PR19MB79291F1D01E968D0A2F6BE4BD87C2 at CH3PR19MB7929.namprd19.prod.outlook.com
> >
>
> Content-Type: text/plain; charset="us-ascii"
>
>
>   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 at junknet.net>
> To: John Lawson <john at tubetestingpros.com>
> Cc: greenkeys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] ITTY to ASR33
> Message-ID: <EACD324F-BEFC-49BF-B633-E472BA494C8E at junknet.net>
> Content-Type: text/plain; charset="utf-8"
>
> 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 at 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
> > ______________________________________________________________
> > GreenKeys mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:GreenKeys at 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 at junknet.net
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> ------------------------------
>
> Message: 12
> Date: Sun, 6 Oct 2024 10:47:08 -0500
> From: Eric Moore <mooreericnyc at gmail.com>
> To: Greenkeys <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] Xitex UDT170 60ma current loop interface
> Message-ID:
>         <CAE1er55S-9vUJVU6jJYQ2jLzu6k9qoAnJw6ce0SeiftV+=
> st+g at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Anyone know what the pinout for this is? I gather from advertisements I
> found it should be 60ma.
>
> -Eric
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> ------------------------------
>
> _______________________________________________
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>
> End of GreenKeys Digest, Vol 249, Issue 4
> *****************************************
>
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