EF86, MULLARD, SOLID SCREEN, FACTORY CODE, 9r3 B4K5, BLACKBURN, OCTOBER 1964 MANUFACTURE
EF86, MULLARD, SOLID SCREEN, FACTORY CODE, 9r3 B4K5, BLACKBURN, OCTOBER 1964 MANUFACTURE
On offer today one of these striking and ultra low hum devices. This one shows a particularly pleasing high gain from its anode current test data.
The Mullard EF86 features the solid screen around the anode plate and rigid internal support. The anode has a solid screen design which covers the anode plate and is grounded. Some customers consider this screen better than the mesh screen design due to it exceptionally low levels of hum.