FW: [GreenKeys] DURA Selectric ASR terminals free

steven at malikoff.com steven at malikoff.com
Sun Dec 15 20:15:02 CST 2019

> On 12/15/2019 01:19 AM, Dave Wade via cctalk wrote:
>> I wonder if there is any interest here...
>> -----Original Message-----
>> From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net> On Behalf Of John Lawson
>> Sent: 10 December 2019 17:41
>> To: greenkeys at mailman.qth.net
>> Subject: [GreenKeys] DURA Selectric ASR terminals free
>> Greetings List!
>> I have a couple of "DURA" Selectric ASR terminals.  I also have some limited documentation on them. Neither of them work as far as I know. I tried to run the one in the pic when I first got it, but it's jammed - so on the shelf it went.
>> They appear to be an 8-level code, dunno if ASCII, EBCDIC, or what.
> The punched tape is EIA, I think.  There are diode matrices
> to convert to the internal Selectric code of rotation and
> tilt of the ball.  I had one of these hooked to a CP/M
> system back around 1980, I used it exclusively as a printer.
> I could likely dig out some code that sent the data to
> them.  A quick look did not turn up the interface.
> I seem to recall it had some pretty weird logic levels, PNP
> Germanium transistors, etc.
> It is possible to trip too many solenoids at one time and
> command the rotate or tilt summing levers to exceed the
> limits of the ball.  That will break bands on the carriage.
> I had no problem getting replacement parts when I had that
> happen on mine.  Not too sure Selectric parts are available
> anymore.
> Jon
>> These are joining the ever-expanding list of "Projects Never to be Completed", so if anyone is interested, lemme know.
>> They are free, you pay shipping, they are about 50 pounds each and will require some thoughtful packing.
>> Local pickup is happily offered, and I could possibly be bribed into delivering them within a day's drive of Carson City (weather permitting).
>> Cheers
>> John KB6SCO
>> Carson City

Interfacing the Dura 1041 is very well covered in the book 'THE SELECTRIC INTERFACE A Hands-on Approach' by George Young.
There are whole chapters on the Dura 1041 printer, encoding the Dura eyboard, interfacting the punch, tape reader and more.


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