21 Feb
2013
21 Feb
'13
11:01 a.m.
On Thu, Feb 21, 2013 at 1:19 PM, John Wilson <wilson at dbit.com> wrote:
On Thu, Feb 21, 2013 at 06:10:16AM -0500, allison
wrote:
I know some guys who do WWII historical re-enactment as a Signal Corps
(and by a strange coincidence, I was the point of commonality to
someone whose father was in the unit they portray. They were all
happy to meet each other). One of the guys has an old 5-bit TTY they
now use in the field for passing messages during events. It was "fun"
getting it to work as a peripheral with modern hardware (to store then
send "messages from HQ"). ISTR the relay in the TTY won't fire under
about 80VDC.
-ethan
Baudot for micros was always an oddity.
Totally. As if the 45.45 bps and 1.4 stop bits and FIGS/LTRS sticky shifts
aren't alien enough, the 60 mA current loop uses voltages that you normally
try to keep *away* from digital electronics (I shocked myself a bunch of
times with RTTY stuff -- never happened with model 33s).