2017-06-12 20:09 GMT+02:00 Mattis Lind <[email protected]>: > > > 2017-06-12 19:55 GMT+02:00 Mattis Lind <[email protected]>: > >> >> >> 2017-06-12 18:59 GMT+02:00 Al Kossow via cctech <[email protected]>: >> >>> >>> >>> On 6/12/17 7:17 AM, Mattis Lind via cctech wrote: >>> >>> > There is a note in my RS64 manual, page 3-1 / Figure 3-2, that says >>> "Silver >>> > colour Soaped water, Dark blue Special cleaning liquid" and then an >>> arrow >>> > to the disk surface in the picture. >>> >>> > Any thoughts about what the "Special cleaning liquid" could be? >>> > >>> >>> No, but I hope you don't have the dark blue coated disk. >>> >> >> The disk is very dark blue... >> > > > Here are a couple of pictures: > > http://i.imgur.com/lf6K5mc.jpg?1 > > http://i.imgur.com/E8UVvma.jpg?1 >
It looks very much like David Gessweins DF32. He claims it is nickel cobalt alloy plating. What could be the best cleaning method for this plating? https://www.pdp8.net/dfds32/pics/df32diskorig.shtml?small > > >> >> >> >>> >>> One of the designers told me the original platters were rhodium plated >>> to reduce >>> friction, and they have the problem that the surface gets contaminated >>> due to air pollution >>> (apparently a serious problem with them in LA back in the day). >>> >>> The special stuff probably doesn't react with it. >>> >>> >>> >> /Mattis >> >> > /Mattis
