The 45 baud machines do NOT run on 20mA. They usually
run on 40mA :-) 20mA is the domain of model 28, 32, 33 etc.
14's, 15's 19's, 28s are generally 60mA 120VDC signaling. My 28s have speed
select for 60 WPM (45.45 baud), 75 WPM (56.9 Baud) and 100 WPM (74.2 baud). 100 WPM is
very fast. It is amazing these things don't fly apart! Lots of great videos on you
tube of these things running.