[GreenKeys] M28 ASR full duplex?

[Nick England]

As Eugene says, all the connections are on the terminal strips connected so
you can do whatever you want. But standard usage for all the Navy M28 KSRs
and ASRs that I have seen so far have a single loop connection with
keyboard and printer in series (also TD in the ASR).
Maybe because you wanted to also print what you were sending? But what do I
know.....
nota bene - the 28ASR K-KT-T switch would let you cut a tape locally while
printing from elsewhere.

Nick England K4NYW
www.navy-radio.com


On Sat, Apr 8, 2023 at 2:02 PM Duncan Brown <duncanancy at earthlink.net>
wrote:

> I'm mainly a Kleinschmidt guy, and I have never had to dig into the M28
> wiring before.  Other than change a couple of motor-start capacitors, my
> M28s have just run.
>
> But now that I am getting into this M28 ASR wiring for our TMC station,
> it looks like the M28 (especially the AN/UGC-6) was mainly used with TX
> & RX in just one loop.
>
> Was the M28 ever used in full-duplex (separate TX & RX loops)?
>
> Ham TUs like HAl & Dovetron would take one loop and separate the TX & RX
> signals.  But what about military units like the CV-2460?  Just looking
> at the manual, it looks like it needs separate TX & RX connections from
> the TTY, but the UGC-6 does not seem to offer that option. (At least not
> from looking at the UGC-6 schematic, Fig 12-38.)
>
>  From the Teletype Corp. schematics, I can see that the M28 ASR has very
> flexible wiring and you could bring out the keyboard contacts
> separately.  But I'm surprised that the UGC-6 schematic doesn't show
> that option. Or is there another schematic to show separate TX &RX wiring?
>
> Thanks,
>
> Duncan
> K2OEQ
>
>
>
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