[GreenKeys] Another non-standard RTTY terminal

[Chris Elmquist]

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