Vintage Soviet Device Tape Punch PL-150 Computer Punched Paper Tape Mainframe. Dimension: 310 x 240 x 210mm. Year of manufacture: 1971. The device was used previously, a complete test has not been performed. The device was stored for a long period of time in a warehouse. You can look all details at the original photos. The puncher is designed for punching information holes in punched tape, punched tape is a fairly reliable information carrier in itself. Previously, when floppy drives did not yet exist, and drives on magnetic drums and tapes were accordingly very expensive, punched tapes were used to save programs – these are paper tapes onto which a program was punched in the form of holes, each row of holes had its own symbol. From the middle of the 20th century, punched tape began to be used as an information carrier for the first electromechanical computers. In the middle of the tape there is a track with a smaller perforation, the so-called “transport track”. It serves to move the belt using a gear wheel. Due to the simplicity devices, punched tape has become widespread in computer technology. Later computer punched tapes were 7 or 8 rows wide and used ASCII encoding for recording. There were ribbons with a different number of rows (even with 2 rows). They were used in mini-computers until the mid-1980’s. They were supplanted by magnetic storage media. The disadvantage of paper, the most common, punched tapes in comparison with punched cards was the low mechanical strength of the tape and the impossibility of “manual editing” of text files (adding or replacing punched cards in the deck). Compared to magnetic tapes, the main disadvantage was the low read / write speed. The maximum write speed is up to 80-150 bytes/s, the maximum reading speed is up to 1500 bytes/s (for example, using the FS1501 photo reader). At the same time, the punched tape moves at a speed of up to 4 m/s (with a recording density of 2.54 mm per byte). The recording method is mechanical for example, tape punch PL20, PL-80, PL-150 etc. , the reading method is both mechanical (for example, the Soemtron 472/3 reader has 8 reading contacts) and optical FS751, FS1501, etc. When recording, paper circles from the punctured holes fall into a removable container. When reading, on the side of the punched tape exit from the reader, a punched tape rewinder can be placed. 100% Genuine Soviet items. Safe and careful packaging. Vintage Soviet Device Tape Punch Pl-150 Computer Punched Paper Tape Mainframe. Vintage Soviet Device Tape Punch Pl-150 Computer Punched Paper Tape.. Vintage Soviet Device Tape Pun.. Vintage Soviet Device Tape Punch Pl-150 Computer Punched Paper Tape Mainframe_1. Vintage Soviet Device Tape Punch Pl-150 Computer Punched Paper Tape Mainframe_2. Vintage Soviet Device Tape Punch Pl-150 Computer Punched Paper Tape Mainframe_3. Vintage Soviet Device Tape Punch Pl-150 Computer Punched Paper Tape Mainframe_4. Vintage Soviet Device Tape Punch Pl-150 Computer Punched Paper Tape Mainframe_5. Vintage Soviet Device Tape Punch Pl-150 Computer Punched Paper Tape Mainframe_6. Vintage Soviet Device Tape Punch Pl-150 Computer Punched Paper Tape Mainframe_7. We pack all our items carefully and securely. We have positive experience of Internet commerce since 2010. If you have any problems or questions, please write us a message and we answer within one day. Thank you for your visit. All Right Reserved Zorolan – 2011. This item is in the category “Computers/Tablets & Networking\Vintage Computing\Vintage Computers & Mainframes”. The seller is “zorolan” and is located in this country: UA. This item can be shipped worldwide.
- Model: PL-150
- Country/Region of Manufacture: Russian Federation
- Type: Mainframe
- Vintage: Yes
- Brand: USSR