Трансформатор LUNDAHL LL1527. 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
General Purpose Transformers
LL1527 and LL1527XL
LL1527 is a  truly general purpose transformer for microphone or line input, for output and for galvanic isolation of
units. LL1527 has been generally accepted by the audio industry as the general purpose audio transformer.
The LL1527 is built-up from two coils, each with one primary and one secondary winding separated by an electrostatic
shield. The core is a high permeability mu metal core. The transformer is housed in a mu-metal can.
In the LL1527XL, the core is about 45%  larger than in the LL1527, resulting in a larger level capability.
Turns ratio:                                             1 + 1 : 1 + 1
Pin layout (viewed from component side) and winding schematics:
1                  5
4              8
3              7                 2                  6
LL1527   E
2  (top view)   6                4                  8
1              5
3                  7
E
Spacing between pins    Spacing between rows of pins   Offset of earth pin from adjacent row:
5.08 mm  (0.2")            27.94 mm  (1.1")                   2.54 mm (0.1")
LL1527                  LL1527XL
Dimensions (L x W x H above PCB, in mm)   38 x 24 x 17              38 x 24 x 20.5
Weight:                                   48 g                      65 g
Rec. PCB hole diameter:                   1.5 mm                    1.5 mm
Static resistance of each primary:        43W                       54W
Static resistance of each secondary:      56W                       67W
Distortion (primaries connected in series, source  +  6 dBU  0.1% @ 50 Hz  +  9 dBU  0.1% @ 50 Hz
impedance 800W ):
+16 dBU  < 1  %  @ 50 Hz  +19 dBU  < 1  %  @ 50 Hz
Self resonance point :                    > 200 kHz                 > 200 kHz
Optimum load for best square-wave response  3 - 4 kW                3 - 4 kW
(sec. in series):
Frequency response (source 800W  , load 4 kW  10 Hz -- 150 kHz +/- 0.2 dB  10 Hz -- 150 kHz +/- 0.2 dB
serial connection):
Loss across transformer (at midband, with  0.4 dB                   0.5 dB
above termination):
Isolation between windings/ between windings  4 kV / 2 kV           4 kV / 2 kV
and shield:
Connection alternatives and suggested applications:
Serial-serial connection (1 : 1)             Parallel-parallel connection  (1 : 1)
+         for line input                                (e.g. mic input)
4             8
4             8
3              7
E                                 3             7
2              6                                           E
2             6
1              5                                                       +
+                        +   1             5
Parallel-serial connection (1 : 2)                  Parallel-split connection
(e.g. mic. input)                                   (1 : 1 + 1)
+                                                     +
4             8                                 4              8
3              7                                3              7
E                                                E
2              6                                2              6
1              5                                1              5
+                                              +                              +
R980616