[GreenKeys] iTTY and the Volpe USB Interface Board

[Dennis Hanley]

I just bought a couple of 2211's from Jameco for $3.99 each.

I'm hoping PC boards become available, but if not, I'm planning on using
perf board and "ugly" method...

Fingers crossed!

Dennis Hanley, KB6C



On Mon, Feb 8, 2021 at 2:34 PM Eric <epvgk at limpoc.com> wrote:

> I'm curious if the 2211 chips from China work okay. I suppose at some
> point I'll need to redesign around some other part or just do it digitally
> but if there's a supply of 2211's still around we may as well keep using
> them.
>
> On February 8, 2021 2:27:39 PM PST, Steve Garrison <steve.n4tty at gmail.com>
> wrote:
> >I always use Volpe Demod for one and Volpe USB for the other.  Some use
> >Version 1 and Version 2, but I always think of different versions of
> >the same board with maybe minor differences.
> >
> >
> >
> >Steve G./N4TTY
> >
> >
> >
> >P.S.  And I have helped Eric assemble a good number of the Demod boards
> >in the past and will have a KiCad version soon.  I’ll probably leave
> >the Version 1 intact but add an A, B, C, etc if I make minor changes.
> >First one will be Version 1A.
> >
> >
> >
> >From: greenkeys-bounces at mailman.qth.net
> ><greenkeys-bounces at mailman.qth.net> On Behalf Of eric
> >Sent: Monday, February 8, 2021 3:52 PM
> >To: Paul Birkel <pbirkel at gmail.com>
> >Cc: greenkeys at mailman.qth.net
> >Subject: Re: [GreenKeys] iTTY and the Volpe USB Interface Board
> >
> >
> >
> >There are two different boards that people are calling the "Volpe
> >board" which is probably my fault for not giving them actual names.
> >
> >The USB-interface one is meant for translating digital data on modern
> >computers to/from teletype loops.
> >
> >The RTTY demodulator one is meant for demodulating an audio FSK stream
> >(like ITTY) and keying a teletype loop from it.  With this one it's
> >easy - play the ITTY stream on your computer, phone, or tablet, and
> >connect the audio output to the board.
> >
> >The USB interface board is meant more for teletypes interacting with
> >software running on computers. That said, it *is* sort of possible to
> >do it by using software to demodulate the ITTY stream and feed the text
> >output to the loop via the USB interface board.
> >
> >Someone here figured out the commandline for this a while back, but it
> >needs to run on a Linux computer (might work in WSL - windows subsystem
> >for linux - on Windows also, but I haven't tried). Also you need the
> >right packages installed, ie lame, minimodem, and curl:
> >
> >curl -N -s http://internet-tty.net:8000/ITTY | lame --decode --quiet
> >--mp3input - - | minimodem rtty -i -a -q --rx-one -R 11025 -f - >
> >/dev/ttyACM0
> >
> >This is a total hack, though a very clever one, and it'd be a lot
> >easier to use a hardware demodulator.
> >
> >eric
> >
> >On 2021-02-07 03:38, Paul Birkel wrote:
> >
> >Now that my M19 is approaching a working state (currently fussing with
> >CAR RET bounce/settling and the dashpot)  I’d like to exercise it from
> >an iTTY feed.
> >
> >
> >
> >I have an assembled original (green PCB) Volpe USB interface board.
> >
> >
> >
> >Is ttyBash (https://teletype.net/display/TEL/ttyBash) coupled with
> >fldigi (http://www.w1hkj.com/) the standard/only software path to
> >connect-the-dots?  Any alternatives that I should be considering?
> >
> >
> >
> >Does anyone have any specific experience establishing a feed from iTTY
> >via the Volpe board that they can share?
> >
> >
> >
> >Thank you,
> >
> >paul
> >
> >
> >
> >
> >
> >
> >
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> >
> >
> >
> >
> >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
> >
> >
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> >Message delivered to epvgk at limpoc.com <mailto:epvgk at limpoc.com>
> >
> >
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>
> >>> 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 dennis.hanley at gmail.com
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