Трансформатор LUNDAHL LL1570XL. Инструкция на английском языке

Tibeliusgatan 7                        International    Domestic
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Transformers for splitting
LL1570 and LL1570XL
The LL1570 is designed for splitting signals in application where large ground differences may appear, but is also very
useful as a general purpose audio transformer. By careful design, the capacative coupling between the different part of
the transformer is kept to a minimum. The three-section winding structure which is necessary for decoupling also results
in a very high bandwidth. The transformer is built up from two coils, each with primary and secondary windings
separated by electrostatic shields, and a high permeability mu-metal core. The two coil structure in combination with the
mu-metal can results in high immunity to external magnetic fields.
In the LL1570XL, the core is about 45%  larger than in the LL1570, resulting in a larger level capability.
Turns ratio:                                             1 + 1 : 1 + 1
Pin layout (viewed from component side) and winding schematics:
E 2
1                  5
4              8
E1
3              7                   2                  6
EP LL1570
2    (top view)   6                4                  8
E2
1              5
3                  7
E 1
EP = Can and core
Spacing between        Spacing between      Offset of earth pin from    Recommended
pins               rows of pins           adjacent row:         PCB hole diameter:
5.08 mm  (0.2")       27.94 mm  (1.1")         2.54 mm (0.1")             1.5 mm
LL1570                  LL1570XL
Dimensions (Max. L x W x H above PCB(mm))  38 x 24 x 17             38 x 24 x 20.5
Weight:                                    48 g                     65 g
Static resistance of each primary:         50 W                     62 W
Static resistance of each secondary:       50 W                     62 W
Distortion (primary level, primaries connected  0.1% @ +  6 dBU,  50 Hz  0.1% @ +  9 dBU,  50 Hz
in series, source impedance 800W )         1  % < @ +16 dBU, 50 Hz  1  % < @ +19 dBU, 50 Hz
Self resonance point :                     > 250 kHz                > 250 kHz
Optimum load for best square-wave response  2.8 kW in series with 0.7 nF  2.8 kW in series with 0.7 nF
(secondaries. in series):
Frequency response (source 600W, load as   10 Hz -- 200 kHz +/- 0.5 dB  10 Hz -- 200 kHz +/- 0.5 dB
above, serial-serial connections):
Isolation winding-winding / winding-shield /  4 kV / 2 kV / 2 kV    4 kV / 2 kV / 2 kV
shield-shield
Serial-serial connection (1 : 1)  Parallel-parallel connection (1 : 1)  Parallel-serial connection  (1 : 2)
for line input or output           (e.g. mic input)                (e.g. mic. input)
+                               +            +
+   4           8               +   4           8                    4            8  +
E1                              E1                               E1
3            7                  3            7                   3            7
EP                              EP                               EP
2            6                  2            6                   2            6
E2                               E2                               E2
1            5                  1            5                   1            5
Parallel-split connection with separate grounds (1 : 1 + 1)
+
4             8
E1
3             7
EP
2             6
E2
1             5
+                          +
R980616