21 Nov
2014
21 Nov
'14
12:35 p.m.
Sure, I get all that.. but what on Earth does it have to do with the thread
topic - which concerns what to look for when acquiring a Model 33 Teletype?
I think we're assuming you are going to connect this ASR33 to something else.
ASR33s have a 20mA (or 60mA, link selectable, I think) current loop interface. Not
RS232 (OK, I mentioned the Data Dynamics machine that used ASR33 mechanisms,
but strictly that's not an ASR33). The most common machine (I think) with a 20mA
current loop interface is a Unibus PDP11. Hence all the comments, if you had
one of those, you could easily link the ASR33 to it.
That said, a quick google search for 'RS232 current loop' (no quotes) throws up
a number of commerical units and built-it-yourself schematics to convert the current
loop interface to RS232.
All of that info seems peripheral, at best. And no, I
don't have +any+ PDP
Pun intended?
-tony