Teletype Model 33
| Teletype Model 33 | |
|---|---|
| Manufacturer | Teletype |
| Model | Model 33 |
| Lifetime | |
| Introduced | May, 1963 |
| Communication | |
| Interfaces |
RS-232C, 20 mA current loop |
| Baud Rates | 110 |
| Character Modes | |
| Attributes | Normal |
The Teletype Model 33 was an electromechanical teleprinter introduced by the Teletype Corporation in May 1963. It was designed as a low-cost, light-duty terminal for the computer market and was among the first commercial devices to support the 7-bit ASCII standard.[1] Unlike earlier Teletype models that used the 5-bit Baudot code, the Model 33 utilized an ASCII character set to facilitate data communication with modern computer systems.
The terminal operates at a fixed speed of 110 baud. The printing mechanism is an impact system using a cylindrical type wheel that strikes an inked ribbon against roll paper. The standard carriage supports a line length of 72 columns.[2] The base price for the unit at launch was approximately $700. The mechanism and maintenance procedures are documented in the manufacturer's technical bulletins.[3]
The Model 33 was produced in three primary configurations: the ASR (Automatic Send-Receive), which included a paper tape reader and punch; the KSR (Keyboard Send-Receive); and the RO (Receive-Only). The unit weighs approximately 56 lbs without the stand.[3] [4][5]
Line lengths:
- 72 columns
References
- ↑ "Auerbach Guide to Alphanumeric Display Terminals", Auerbach Publishers, 1975
- ↑ "Teletype 33 Product Brochure". Teletype Corporation. http://www.bitsavers.org/pdf/teletype/33/33_Product_Brochure.pdf. Retrieved February 26, 2026.
- ↑ 3.0 3.1 "33 Teletypewriter Sets Technical Manual". Teletype Corporation. September 1974. http://www.bitsavers.org/communications/teletype/33/310B_Vol_1_33_Teletypewriter_Sets_Technical_Manual_Sep74.pdf. Retrieved February 26, 2026.
- ↑ Teletype advertisement, Computerworld, July 25, 1973, pg. 29
- ↑ Duane E. Sharp (1977). Handbook of Interactive Computer Terminals. p. 86. http://archive.org/details/handbookofintera00duan.
