Current Loops and TTYs (was Re: New batch of pdp8 OMNIBUS to USB interface! Please Read and react!)

[Ethan Dicks]

On Tue, Feb 14, 2017 at 4:22 PM, Philipp Hachtmann <hachti at hachti.de> wrote:
>>> PS: Add a 45.5 baud serail port. Control everything with a  5 level
>>> TTY. :)
>>
>> Dirty casual.  20mA current loop or nothing.
>
> The 45 baud machines do NOT run on 20mA. They usually run on 40mA :-)

The M19 is 60mA at 100VDC... takes a bit to pull that relay.

> 20mA is the domain of model 28, 32, 33 etc.

Yep.  That's all I have in my own pile... (33 and 35).

-ethan