Sony WM-D3 wow flutter – YouTube. Beautiful sounding restored Sony WM-D3. Very low WOW and Flutter, service manual specification (see second last picture) is 0.13% measured on this unit around 0.10% (see video). All functions work as they should be. Optical there are light user marks, but consider his age its in overal good condition. Leather case has 2 tears in the hinged piece (see last photo). The following parts have been replaced by new. Small reel gear. Walkman has been completely cleaned and lubricated where necessary. I’m very sorry to the majority of honest people out there but there are zero feedback members that don’t pay or scamming when the received the items. This results in the fact that i don’t sell items to zero feedback members. 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? Theyre 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 doesnt. 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. 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. Is responsible for the correct tape speed. Bad capstan is responsible for high wow flutter. The item “Sony WM-D3 restored, serviced! Real low WOW and flutter (see video)” is in sale since Friday, July 10, 2020. This item is in the category “Consumer Electronics\Portable Audio & Headphones\Personal Cassette Players”. The seller is “2015.neijn” and is located in Weert. This item can be shipped worldwide.

• Model: WM-D3
• Playable Media Format: Cassette Tape
• Color: Black
• MPN: Does Not Apply
• Brand: Sony
• Product Line: Walkman
• Marke: Sony
• Modell: WM-D3
• Herstellungsland und -region: Japan
• Produktart: Walkman
• Features: Cassette Tape