Radio Teletype Machines and Modems

Amateur RTTY has been a key interest when I started as a radio amateur in 1966 - mechanical teleprinters of course - using a 1948 ex-military Siemens T68d and the Adaptor Field C.F.S. with 850Hz shift. Today RTTY is done by computers, but still using the old specifications. Interesting base information on this topic is found in the two articles listed on the left.

Click on the following entries to see information on these sets: