[GreenKeys] Model 15, HAL ST-6000, & MMTTY

[Don Cunningam]

Bob,

This will be very complicated to do, but I do think it can be done with 
some schematic study on the ST-6000.  You will effectively be tying two 
separate systems together to send/receive signals.

The ST-6000 will hook to the Model 15, through its built in loop supply, 
and you can send and receive without any computer assistance on the 
Model 15.  MMTTY is a program designed specifically to run on Windows 
based computers, after Teletypes had been retired so it is a separate 
system as well.  The ST-6000 DOES also have an RS-232 large plug on the 
back that you can easily interface to computer devices by cutting traces 
and adding "jumper wires" on the "bypass" plug that is on the back for 
it to work.  That is a multi-pin Molex plug with HAL's circuit board 
attached to make connections.  Look at the section in your manual for 
the ST-6000 at that plug and you will start to see how it works and 
which traces you will have to cut and jumper wires added to make you 
able to interface your computer and MMTTY together.

I hope that isn't too confusing and actually might help you, Bob.
73,
Don, WB5HAK

On 10/22/2021 9:27 AM, AA6RK via GreenKeys wrote:
> Hello All...
> Now that my ribbon reversal problem is solved, I have questions on how 
> to set up the Model 15 to operate with MMTTY through the HAL ST-6000. 
> Please contact me if you are using this equipment configuration.
> I am able to copy text from the MMTTY program using what the HAL 
> manual refers to as the "low-tone set" with a mark frequency of 1275. 
> Not sure if that will work on HAM frequencies. Still I haven't 
> conquered sending to the MMTTY from the teletype.
> Thanks in advance for your experienced help.
> Bob...
>
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