Sony WM - DD33 Blue Very Rare Center Gear Pinch Roller En Capstan Ring.
Item History & Price
| Reference Number: Avaluer:1177768 | Brand: Sony |
| Manufacturer warranty: None | Model: WM-DD33 |
| MPN: Does Not Apply |
Sony WM-DD33 - YouTubeVideo will open in a new window
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Very nice WM-DD33 in the color blue, completely restored. New center gear, pinch roller and capstan ring. Optical and mechanical in great condition, plays very beautiful (see video here above). Original leather case are included!
New center gear and not a repaired/glued one - when... the gear is glued this results in higher wow-flutter, so less good sound quality. - Why do the original gears always crack? They’re usually made of POM material. This material is very reliable, long lasting and has very good friction properties. However, it has one negative property. It tends to shrink. It shrinks when it is heated, for example when player is left on sun or in car. By heating POM material to 60 C, it will shrink permanently about several percent. It also shrinks with time.Problem is, when this gear is installed on some other part, for example on metal axle. Plastic material shrinks, while meta one doesn’t. High tension in plastic part will cause that it cracks. Some parts are made of other than POM material. This can be short lasting material, fragile, that breaks into several pieces after some time.
Pinch roller is replaced: Reason why this is important: - it can curl (eat) some or all tapes- it can cause speed variations- it can cause azimuth instabilities- playback can be randomly stopped Capstan is replaced: Reason why this is important: - is responsible for the correct tape speed- bad capstan is responsible for high wow flutter
Using the eBay App? Paste link into a browser window:[isdntekvideo]
Very nice WM-DD33 in the color blue, completely restored. New center gear, pinch roller and capstan ring. Optical and mechanical in great condition, plays very beautiful (see video here above). Original leather case are included!
New center gear and not a repaired/glued one - when... the gear is glued this results in higher wow-flutter, so less good sound quality. - Why do the original gears always crack? They’re usually made of POM material. This material is very reliable, long lasting and has very good friction properties. However, it has one negative property. It tends to shrink. It shrinks when it is heated, for example when player is left on sun or in car. By heating POM material to 60 C, it will shrink permanently about several percent. It also shrinks with time.Problem is, when this gear is installed on some other part, for example on metal axle. Plastic material shrinks, while meta one doesn’t. High tension in plastic part will cause that it cracks. Some parts are made of other than POM material. This can be short lasting material, fragile, that breaks into several pieces after some time.
Pinch roller is replaced: Reason why this is important: - it can curl (eat) some or all tapes- it can cause speed variations- it can cause azimuth instabilities- playback can be randomly stopped Capstan is replaced: Reason why this is important: - is responsible for the correct tape speed- bad capstan is responsible for high wow flutter
