[GreenKeys] Another non-standard RTTY terminal

[William Wuttke]

Hi Chris,
As Harold said. We're looking forward to you getting the heavy metal on the
air. You'll need some sort of Loop to RS-232 converter for the M28. I have
an M33 that I have used with the ST-8000A with an arduino-based
ASCII-Baudot/110-45.5baud converter that resides inside the M33.
73,
Bill
KE3BK

On Sun, Nov 23, 2025 at 6:00 AM Chris Elmquist <chrise at pobox.com> wrote:

> Very good.
>
> After this thread, I dug out the Silent 700, model 787 just to fire it up
> and that didn't go so well.  I think it's got power supply issues now as
> it comes up in an error state, and the printhead moves but nothing prints.
>
> I guess it got lonely in the cupboard as it was working A-OK when I put
> it away a couple years ago.
>
> So, that one will go back on the bench.   I actually did a fairly involved
> restoration on it a few years ago, even having a new platen made so I
> know it can work well...
>
> I am interested in joining you guys in the heavy metal world so I need to
> get busy and get one of my ST-8000A connected to a radio and that to a
> TTY of some sort.  I have M28s, M33s, various of these Silent 700 as
> mentioned and couple DECWriters too, just to keep with the keyboard+printer
> machines.
>
> 73, Chris NØJCF
>
> On Saturday (11/22/2025 at 10:06AM -0800), William Wuttke wrote:
> > I have a homebrew hardware/software setup using an ESP32-based
> >  "Modem-Teletype Interface Unit (MTIU)" and a modified MFJ RS-232
> switchbox
> > to serve as a digital connection between virtually any type of terminal,
> > Baudot or ASCII, and any of my terminal units (HAL ST-8000, HAL ST-8000A,
> > Dovetron MPC-1000, Flesher TU-300, Heathkit HD-3030) . I have a Model 28
> > teletype connected via a loop to RS-232 converter. AFSK from the selected
> > terminal unit goes through a manual stereo switchbox to a USB soundcard
> > which is connected to a mac mini. In the mac mini the audio is routed
> > through Rogue Amoeba Loopback to SmartSDR which is controlling the Flex
> > 6400M radio. Also running on the mini is a homebrew RTTY terminal program
> > connecting the Silent 703 (or any other terminal device) to the MTIU. The
> > terminal unit used in the video is the Flesher TU-300. It's kind of a
> > convoluted setup developed over the years of experimentation with this
> > forgotten mode of communication. Actually, RTTY is probably the only
> > digital mode that you can still experiment with. There are still a few of
> > us who communicate over HF with "heavy metal".
> > Having Fun with RTTY.
> > Bill
> > KE3BK
>
> --
> Chris Elmquist
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20251123/2e107e44/attachment.html>