Lundahl LL1530 Audio transformer
Interesting items
Description
LL1530 is a microphone input transformer used for matching a 200 or 800 ? microphone to 10 k? or for matching a high impedance source to a microphone input. The transformer consists of two coils, each with one primary and one secondary winding separated by an electrostatic shield, and a high permeability mu-metal core. The transformer is encapsulated in a mu-metal case for magnetic shielding. For best performance, the high impedance side of the transformer (3.5 + 3.5) should be connected in series.
Turns ratio: 1 + 1 : 3.5 + 3.5
Dims (Length x Width x Height above PCB (mm)): 38 x 23 x 16
Spacing between pins: 5.08 mm (0.2")
Spacing between rows of pins: 27.94 mm (1.1")
Offset of earth pin from adjacent row: 2.54 mm (0.1")
Weight: 46 g
Rec. PCB hole diameter: 1.5 mm
Static resistance of each primary: 42 ohms