[GreenKeys] Another non-standard RTTY terminal

[Harold Hallikainen]

Great! I'm on the 20 meter autostart frequency (attached) almost all day
every day. I look forward to seeing you there!

Harold
https://w6iwi.org


On Sun, November 23, 2025 7:00 am, Chris Elmquist 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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>>>>
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