
High Level Line Input Transformer
LL1592
LL1592 is a high-level line input transformer with a mu metal lamination core. The transformer is designed for high end
pro audio line input applications with or without phase splitting. The windings are arranged to give a high degree of
symmetry if the transformer is used for phase splitting. The dual-coil structure also greatly improves immunity to
external magnetic fields from e.g. power supplies and motors. Primary and secondary windings are separated by
electrostatic shields.. The transformer is housed in a mu-metal can.
Turns ratio: 1 + 1 : 1 + 1
Pin layout (viewed from component
side) and winding schematics:
Dimensions (L x W x H above PCB, in mm)
47 x 28 x 20
Spacing between pins
5.08 mm (0.2")
Spacing between rows of pins
35.56 mm (1.4")
Rec. PCB hole diameter:
1.5 mm
Weight:
83 g
Static resistance of each primary:
270 Ω
Static resistance of each secondary:
270 Ω
Distortion (primaries connected in series,
source impedance 600Ω ):
+ 23 dBU 0.1% @ 40 Hz
+ 29 dBU < 1 % @ 40 Hz
Self resonance point:
> 120 kHz
Suggested termination for best square wave response,
serial-serial connection.
7k + 400pF
Frequency response (serial connection , source 600 Ω,
load 20 kΩ , no terminating network
10 Hz -- 50 kHz +/- 1.0 dB
Frequency response (serial connection , source 600 Ω,
load 100 kΩ in parallel with 7k + 400pF):
10 Hz -- 100 kHz +/- 1.0 dB
Phase splitting balance (connection 2:1+1. Source 1kΩ,
load (20kΩ +20kΩ) in parallel with 7k + 400pF):,
>46 dB, 10Hz – 50kHz
Phase response (deviation from linear phase)
(source 600 ohm, load 10k (Audio Precision))
10 Hz – 20kHz, < 2°
Isolation between windings/ between windings and shield: 3 kV / 1.5 kV
Connection alternatives and suggested applications:
Serial-serial connection (1 : 1) for high level line input
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TRANSFORMERS
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Tibeliusgatan 7 International Domestic
S-761 50 NORRTÄLJE Phone +46 - 176 13930 0176-13930
SWEDEN Fax +46 - 176 13935 0176-13935
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LL1592
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Phase splitting for
1 : 1+1 input
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Phase splitting for 2 : 1+1 input
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R060127