af his067 » tors 16. mar 2023 10:39
Jeg skrev også til Ferro-tecs Europæiske hovedkontor og fik et meget hjælpsomt svar her til morgen:
Jeg skrev (og jeg undskylder for mit dårlige engelske, som min folkeskolelærer, Lektor Voldbye, straks ville have givet en dårlig karakter. Man må aldrig afslutte en engelsk sætning med et forholdsord! Som Winston Churchill sagde: 'a preposition at the end of a sentence is something up with which we will never put'

)
I read on your American site that you offer refill ferrofluid kits for loudspeakers. I have four very old Dynaudio D28 AF 1” treble speakers which. Are in need of renewed oil. Is this something you can be of help with ?
Ferrotec svarede:
We provide these kits for manufacturers, mostly because the minimum lot size is 600 pieces. These kits contain a specific quantity and specific type it is always matched to specific drive unit. We make then on request, so we don't stock them. We also don't know which specific type Dynaudio uses for which specific drive unit. And they buy a bunch of different types from us. My best guess is that the D28AF uses a low viscosity ester based APG type, and the filling volume must be something like 160 µl, this is given in the data sheet. So in total you need 0.64 ml.
Oracle Delphi Mk 5.5, Mørch DP-8, PT: Ortofon SPU Royal N, NLE22 med batteriforsyninger, Lyngdorf CD2, Roon Rock, Lyngdorf TDAI 3400, Sansui PS 112C HT kabler, Martin Logan Vantage....og en frygtelig masse andet.