Lundahl Active output splitting transformer, LL1560

Audio Split Transformer LL1560

LL1560 is an audio transformer specially built for active splitting. Each of the four secondary windings is surrounded by primary winding parts. This results in a low leakage inductance and ensures that output signal is maintained on three of the secondary windings even if one is shortcircuited, provided of course that driving power is available. The primary windings should be used in parallel.

Turns ratio: 2 + 2 : 1 + 1 + 1 + 1
Dims: (Length x Width x Height above PCB (mm)) 47 x 34 x 23

Housing: Mu-metal
Core: Audio C-core
Spacing between pins: 2.54 mm (0.1")
Spacing between rows of pins: 35.56 mm (1.4")
Weight: 130 g
Rec. PCB hole diameter: 1.5 mm
Static resistance of each primary (average): 120 ?
Static resistance of each secondary (average): 55 ?
Secondary leakage inductance (secondaries in series, primary short circuited): < 1 mH
Max. secondary level (each secondary) + 26 dBU @ 50 Hz
No-load primary impedance(primaries in parallel, primary level): > 1 k? @ 50 Hz, +20 dBU
Balance of output (according to IRT, source 10 ? , Load 600 ?): > 60 dB
Frequency response (source 10 ?, each sec. loaded with 600 ?, 0 dBU sec. level): 20 Hz - 50 kHz +/- 0.5 dB
Isolation between windings / between windings and shields: 4 kV / 2 kV