[GreenKeys] More 28ASR K-KT-T madness

[Duncan Brown]

Nick,

Does the USS Iowa gang know what crypto gear was used that required it 
to step the tape reader?

Thanks,

Duncan

On 2/18/2020 17:41, Nick England wrote:
> I've been helping (via phone & email) the USS Iowa gang with their 
> AN/UGC-48A which is a TEMPEST 28ASR with low-level in/out plus step 
> input to sync the keyboard and TD with a crypto machine.
> Here's how it works according to the wiring diagrams -
> K - keyboard and TD on line, printer on line
> KT - keyboard and TD off line, printer off line, keyboard mechanically 
> punches tape
> T - keyboard off line, TD on line, printer on line
>
> I'm beginning to think that for each model, the K-KT-T switches were 
> wired up by throwing darts at a dartboard........
>
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com>
>
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