[GreenKeys] Hasler Teleprinter

[Ralph Mowery]

----- Original Message ----- 
From: <nico at farumdata.dk>
To: <greenkeys at mailman.qth.net>
Sent: Friday, April 26, 2013 11:33 AM
Subject: [GreenKeys] Hasler Teleprinter


> Hello all
> I've written before about Hasler teleprinters. I've now dissected the one
> I am looking at for the danish IT museum, and it shows that this one is
> equipped for oddball tones.
> In other words, I need something to convert RS232 (Comport signals) to
> these tones.
> The first part would not be a problem, as I use Gil's converters, so I can
> convert from RS232 to mark/space signals. But how to use them to generate
> tones? I was thinking of modems, but what would you do ?
> Regards
> Nico
>

If you only want to demonstrae the printer from a compute, you can use one 
of the ham sound card programs. They put out the tones from the audio output 
of the computer sound card.  Try the mmtty program free from here.

http://www.muenster.de/~welp/sb.htm

If you really want to convert from rs232 then look for a circuit using one 
of the xr2206 IC chips.  This is about as simple as you can get.