#42

It is not powered should I?
And I was just pondering revising my post and asking if that’s the problem

#43

Which revision of Teletype hardware do you have (check which PCB color)?

#44

It appears to be black or a darkish green

#45

Ok. Your bus capacitance is probably just too high with that much stuff attached. Try to reduce cable lengths where possible. If that doesn’t work then try it with your TXb plugged in to power. This will significantly reduce the pull up resistance but hopefully not so much as to create problems…

#46

Thanks, finally it works If the txb is powered.
I have the teletype on one power bus and txb on another, both In the same physical case
Is this ok if it works?
Will it damage anything
Thanks again for all your help

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