Just put up a video of my UGC-129 and all the Harris stuff on YouTube. Three and one half thrill packed minutes of last Saturdays RTTY net on 7087 @850 Hz shift, an old military standard being most hams running there appliance radios stick
with 170 Hz and the hardcore run real teletypes, TU and radios.
Other stations on the net are running things like model 28 and UGC-74 teleprinters.
See the video at:
https://www.youtube.com/watch?v=Dk5-uPcyh4U
Ray F/KA3EKH