LL1969 Lundahl microphone trasformer

LL1969 is a tube microphone output transformer with an internal structure similar to the BV12 transformer. Winding structure of each coil is as follows: Feedback winding, primary winding, feedback winding, Faraday shield, secondary winding. The windings of the two coils are internally connected. The core is a high permeability laminated mu-metal core.