> On May 22, 2017, at 1:44 PM, Jim Brain via cctalk <[email protected]>
> wrote:
>
> OK, go ahead and roll your eyes at me, but I was Dayton Hamvention last
> weekend, and there was a lonely Teletype Model 43 sitting in the flea market
> (on the ground, no less) for free, and so I decided I needed it in my life.
>
> I know it's not considered a "true" teletype, because it's essentially a
> little uC, a KB, and a little dot matrix printer, but I will wear the stigma
> of shame of not owning a "proper" mechanical model 33. I got home last
> night, and the unit fires up and works (well, in local mode. Docs claim it
> is rs232 out the back, but could not coax anything from my PC to it yet),
Does your PC have real RS232? A lot of "RS232" ports are serial ports, but not
with correct RS232 levels. If you have "TTL RS232" [sic] it won't work with an
actual RS232 port.
It may also be RS232-like, as in bipolar signals, but not high enough output
voltages to be compliant. I think modern RS232 receivers tend to accept lower
signal levels than the minimum permitted by the spec; older ones may be less
forgiving.
Finally, check your DTE vs. DCE orientation; you may need a null modem. (Or
you may not want a null modem.)
paul
