[GreenKeys] Signal Line Connection - RS-232 Interface

[Ken Wiebe]

As you may know, for the 33 ASR several people have designed and built circuits to convert current loop to RS-232. Example, I think Mike Douglas may be a member of greenkeys and here is a link to his:

http://altairclone.com/teletype.htm

Question:

What about the 35 ASR?

I need to do this for the 35. I couldn't find much online so I turned to the 35 wiring diagrams in an attempt to find the signal line circuitry equivalent to the 33. On the 33, it's four pins on the P2 connector which equate to the terminal strip pins 3, 4, 6, 7.

I think I found the relevant diagram for the 35, please see attached. Something called "T" power terminal block, pins 5-8.

Anyone know where this is?

Sidenote: See the note in the attd pic, "REMOVE LINK". It looks like that link sets up a loopback, right? That may explain why my 35 seems always to be in Local mode?

Anyway, I don't know where that "T" block is, and if you all could give me a sanity check I'd appreciate.

Am I on the right track you think?

Thanks!

Ken

PS I also attd Mike's schematic for the 33 version of the RS-232 adapter so you can see what I'm making comparisons to
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