Трансформатор LUNDAHL LL1540. Инструкция на английском языке

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Line Input Transformer
LL1540
LL1540 is a high impedance, high level line input transformer.
The transformer consists of two coils, each with one primary and one secondary part separated by a electrostatic
shield. The core is a high permeability mu-metal core, and the transformer is housed in a mu-metal can.
Being a high impedance transformer, the LL1540 should normally be used in a series-series connection.
Turns ratio:                                             1 + 1 : 1 + 1
Dims (Length x Width x Height above PCB (mm)):           38 x 24 x 17
Pin layout (viewed from component side) and winding schematics:
1                   5
4              8
3               7
LL1540   E                   2                   6
2    (top view)   6
4                   8
1               5
3                   7
E
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:                                                  47 g
Rec. PCB hole diameter:                           1.5 mm
Static resistance of each primary:                       610W
Static resistance of each secondary:                     800W
Distortion (source impedance 600W ):                     + 20 dBU < 0.1% @ 50 Hz
+30 dBU  < 1  %  @ 50 Hz
Self resonance point :                                   > 60 kHz
Recommended load for best square-wave response:          22 kW in series with 1nF
Frequency response (source 600W, load 15 k W  )          5 Hz -- 50 kHz +/- 0.2 dB
Loss across transformer (at 1 kHz with above termination):  0.5 dB
Isolation between windings / between windings and shield:  4 kV / 2 kV
Suggested connections:
+                                               +
4              8                                4              8
R/2                                             12k
3    LL1540    7              22 k              3    LL1540    7
E               1 nF                            E
2              6                                2              6
+                               R/2             +                               12k
1              5                                1              5
Suggested connection for symmetric input        Suggested connection for asymmetric input amplifier.
amplifier (recommended for very high CMRR).     2 x 12 k resistors required for > 60 dB CMRR.
Select R for desired input impedance.
With R < 25 k, RC network can be omitted.
R980616