Трансформатор LUNDAHL LL1578. Инструкция на английском языке

Tibeliusgatan 7                        International    Domestic
S-761 50 NORRTALJE          Phone    +46 - 176 13930   0176-13930
SWEDEN                      Fax      +46 - 176 13935   0176-13935
Microphone Input Transformer, Linebox Transformer
LL1578 and LL1578XL
The LL1578 and the LL1578XL are high performance microphone input transformers/linebox transformers with
high permeability mu-metal cores and two three-section (high bandwidth) coils.
In the LL1578XL the core is about 45%  larger than in the LL1578, resulting in a higher signal level capability. In
both types,  primary and secondary windings are separated by  electrostatic shields. The three-section winding
structure of the transformers results in a very low leakage inductance and thus an excellent frequency response.
The transformers are encapsulated in mu-metal cases for magnetic shielding.
Turns ratio:                                                    1 + 1 : 10
Pin layout (component side view) and winding schematics:
1
4               8
3    LL1578                       2                   6
2               6
4
5
1              5
3                   8
Dimensions  (Max. Length x Width x Height above PCB (mm))  38 x 24 x 17
Spacing between pins                                      5.08 mm  (0.2")
Spacing between rows of pins                              27.94 mm  (1.1")
Weight                                                    46 g
Rec. PCB hole diameter                                    1.5 mm
Static resistance of each primary                         22W
Static resistance of secondary                            880 W
Distortion (primaries  connected in parallel,             0.2 % @  -6 dBU primary
source impedance 200W )                        level, 50 Hz
1 % @ + 4 dBU primary
level, 50 Hz
Self resonance point
Optimum termination for best square-wave response
(Connection 1:5, source imp.  200W )
Frequency response (source 200 W, no termination)
Isolation between windings/ between windings and shield   4 kV / 2 kV
Connection alternatives
1              5                            1              5
2   Pins’ side   6                          2    Pins’ side   6
view                                         view
3                                           3
4              8                            4               8
1 : 5                                        1 : 10
R970924