[GreenKeys] Another non-standard RTTY terminal

[Jeffrey Golas]

Be careful with the larger silent 700s, I had one where the platen got sticky and glued the printed to itself. Unknowing, I thought the carriage was stuck and ended up ripping the printed off. Id run some alcohol between them.

Jeff

> On Nov 23, 2025, at 9:01 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
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