ASR-33 Teletype Demonstration - Telephone Museum of PEI.

Longer Hi Res version:
Model ASR-33 Teletype at the Telephone Museum of Prince Edward Island. Second Test using a Telebyte M65A interface. Machine still needs some adjustment. Machine donated by Catherine Filmore two weeks ago. This machine was manufactured in the early 60's and was collected from the University of Ohio radio station in the late 60's by Catherine's late husband, Ivan to be used as a computer i/o device. It has been in excellent storage for many years.

I myself back then used a very similar KSR-33 for that purpose with a VIC-20 and then a Commodore C-64. The KSR version was the same, only minus the paper tape handling equipment. That machine also is still part of the museum's operational collection...

Parts which needed replacement were the top cover, print hammer rubber, and ribbon. Other than that, the machine was in pretty close to mint condition, chiefly needing re-lubrication.

Machines in the museum include: Model 28 ASR, KSR-33, ASR-33, Fairchild Teletypesetter Standard Perforator, and AN/UGC-504 (same as US AN/UGC-136AX) terminal/printer aside, from of course, phones, phones, and more phones! I am looking for a Model 15 or model 19 teletype in the Maritimes for the display. Items such as these can be very expensive to ship. They do not need to be operational - I will repair them.

Settings for Telebyte interface: Full Duplex, Active, and Teletype: 110 baud, 2 stop bits, word length 8, parity even.

Shows external view, then view with cover open, and finally pans over to show the Telebyte M65A interface controlling the serial output of the computer and converting the computer's RS-232 output to 20 m.a. current loop for the teletype.

Aside from their Telex, TWX and Western Union applications, the ASR-33 was a popular i/o device for early computers, adding not only type and print capability, but also punched paper tape punching and reading i/o.

Note: Machine running without its foam pad under the printer, which makes it noisier than usual.

My thanks go out to Ken Gartland of Nova Scotia, an ex-CN/CP Telecommunications service technician for helping me solve a line feed problem and for going over this machine's printer after I had it operating and setting it to meet factory specs with his test set. Thanks also to the Greenkeys list and to all those who helped me find parts for these machines and who gave me advice.

Category:

Education

Tags:

• Teletype
• Teletype Demonstration
• ASR-33
• KSR-33
• ASR-33 Teletype Demonstration
• Telebyte M65A
• Telex
• TWX
• Western Union
• TelcoPEI

[sfnorm]

Is that a TWX or a telex?



[douro20]

The ASR-33 was probably the most popular teletype machine ever made, particularly because it was used with the first personal computers. It was also the only teletype machine to use a rotating type bar.