LUNDAHL LL1531 Audio Transformer (Unit)

The Lundahl LL1531 is a compact, high-impedance line input transformer designed for bridging input applications. It consists of two coils, each featuring one primary winding and one secondary winding separated by an electrostatic shield. The two secondary windings are internally connected in series. The core is made from high-permeability mu-metal laminations, while the transformer is magnetically shielded by a mu-metal enclosure.

As a high-impedance transformer, the LL1531 is normally intended to be used with the primary windings connected in series.