Трансформатор LUNDAHL LL1571. Инструкция на английском языке

Tibeliusgatan 7                        International    Domestic
S-761 50 NORRTALJE          Phone    +46 - 176 13930   0176-13930
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Microphone Input Transformer
LL1571
LL1571 is a microphone input transformer built up from two coils and a high permeability mu metal core.
Each coil is wound in three sections with electrostatic shields connected to separate pins. This result in a
transformer with a very broad band, also ideal for splitting purpose. The two-coil structure in combination with
the mu-metal can results in a high immunity to external magnetic fields.
Turns ratio:                                             1 + 1 : 1.75 + 1.75
Dims (Length x Width x Height above PCB (mm)):           38 x 24 x 17
Pin layout (viewed from component side) and winding schematics:
E 2
1                  5
4              8
E1
3              7                   2                  6
EP  LL1571
2    (top view)   6                4                  8
E2
1              5
3                  7
E 1
Can and core connected to EP
Spacing between pins:                                    5.08 mm  (0.2")
Spacing between rows of pins:                            27.94 mm  (1.1")
Offset of earth pin rows from adjacent rows:             2.54 mm (0.1")
Weight:                                                  48 g
Rec. PCB hole diameter:                           1.5 mm
Static resistance of each primary:                       50 W
Static resistance of each secondary:                     175 W
Distortion (primaries in series, source impedance 800W ):  +  6 dBU  0.1% @ 50 Hz
+16 dBU  < 1  %  @ 50 Hz
Self resonance point :                                   > 200 kHz
Optimum load for best square-wave response
(Source imp.  800 W,                              4 kW in series with 0.3 nF
primaries and secondaries  in series):
Frequency response (source and load as above ):          10 Hz -- 100 kHz +/- 0.5 dB
Isolation between windings/ between windings and shield:  4 kV / 2 kV
Connections:
1 : 1.75                                 1:3.5
Serial - serial connection             Parallel-serial connection
+                  +                   +
+  4            8                           4           8
E1                                       E1
3             7                          3            7
EP                                       EP
2             6                          2            6
E2                                       E2
1             5                          1            5
R980616