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Michael Dunn
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ASR?
Michael Dunn   8/29/2013 3:49:26 PM
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Is the keyboard model not a KSR-33?

Max The Magnificent
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Re: ASR?
Max The Magnificent   8/29/2013 4:02:24 PM
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@Michael: Is the keyboard model not a KSR-33?


Take that scope probe out of your mouth -- you're mumbling -- I'm not expert enough to know -- Leo said it was an ASR-33 -- also, if you go to this page on Wikipedia, the photo they say is an ASR-33 looks like my unit -- maybe some other reader can cast light on this topic...



Michael Dunn
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Re: ASR?
Michael Dunn   8/29/2013 4:12:46 PM
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Ah, I guess the KSR is missing the paper tape, hence only "Keyboard", whereas the ASR has both – "Automatic."  It's the RO that is sans keyboard, not the ASR.

Max The Magnificent
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Re: ASR?
Max The Magnificent   8/29/2013 4:16:46 PM
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@Michael: Ah, I guess the KSR is missing the paper tape, hence only "Keyboard", whereas the ASR has both – "Automatic."

So the bottom line is I'm right and you're wrong -- happy dance time!!! LOL 

David Ashton
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Re: ASR?
David Ashton   8/29/2013 4:25:21 PM
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Half your luck Max, it is a thing of beauty indeed.  From my limited understanding of these devices, KSR-33's were keyboard only (Keyboard Send-Receive) and ASR-33's had the tape punch and reader (Automatic Send-receive).

I had a lot to do with the Siemens T-100, the European equivalent, but they used Baudot code (5 Bits) not ASCII (7 or 8 bits) like yours.  I also trained on an even earlier British model, the Creed 7B, and had a lot of fun with them, see

http://www.eetimes.com/author.asp?section_id=36&doc_id=1284862

Love the idea of having it greet visitors to your office Max, I howp you get that going.  I have seen an RS-232 to 20-mA loop converter circuit somewhere, but I have no idea where.  Do you know if it is half-duplex (both send and receive on the same loop) or full (2 separate loops)?  

Max The Magnificent
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Re: ASR?
Max The Magnificent   8/29/2013 4:30:20 PM
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@David: Do you know if it is half-duplex (both send and receive on the same loop) or full (2 separate loops)?


At the moment I don't even know how to change the typewriter ribbon :-)

 

kfield
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Love this old stuff!
kfield   8/29/2013 4:41:19 PM
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But Max, what's that arm doing in your office??

David Ashton
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Re: ASR?
David Ashton   8/29/2013 4:46:09 PM
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And if it's half duplex it can be local battery or remote battery.......

The ribbons look the same as the ones we used to use on the Siemens T-100s.  

Is it half red and half black (red = tx, black = rx?

There's some data here:

http://www.pdp8.net/pdp8cgi/query_docs/query.pl?Search=teletype&stype=Partial+Wo

At a quick glance looks like the default is FDX which makes life much easier for a converter.  I daresay someone on the site would know lots more.   The site aht led me her had some comments by people who'd tried to get one going and had problems as the grease had solidified, so if yours apears to work you're doing well....

Max The Magnificent
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Re: Love this old stuff!
Max The Magnificent   8/29/2013 4:50:31 PM
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@kfield: But Max, what's that arm doing in your office??

That's the remains of the last manager who gave me a hard time ... but don't worry ... he's "armless" now LOL

Didn't you see my Welcome to the Pleasure Dome (My Office) video?

Dang ... now you've set me off again:

In Xanadu did Kubla Khan
A stately pleasure-dome decree:
Where Alph, the sacred river, ran
Through caverns measureless to man
Down to a sunless sea.

 

Max The Magnificent
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Re: ASR?
Max The Magnificent   8/29/2013 4:52:30 PM
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@David: At a quick glance looks like the default is FDX which makes life much easier for a converter...

You are lucky I don't live in the same town as you, or every evening I'd be knocking on your door whining "Daavvviiidddd -- can you ..." :-)

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