D2S / D2A (1960 to 1963)	Back	Up	Next
The D2S and D2A were identical to the previous DS and DA meters except for the bearing system. The jewel and ball bearing that had been used ever since the Type A was replaced by a new magnetic float bearing (called the "Magnethrust" system). Earlier D2S and D2A meters used the same molded polyester for insulation on the current coils as on the DS and DA meters, but in 1961, this was changed over to butyl rubber which was less likely to deteriorate.	Photo by David Dahle