Трансформатор LUNDAHL LL1922. Инструкция на английском языке

Tibeliusgatan 7                        International   Domestic
LUNDAHL                        S-761 50 NORRTALJE         Phone    +46 - 176 13930   0176-13930
TRANSFORMERS                 SWEDEN                     Fax      +46 - 176 13935   0176-13935
High Level Stepup Line Input Transformer
LL1922
LL1922 is a high-level input transformer similar to the UTC LS-10. Thus it is designed for step-up input from 600
ohm sources. To reach the LS-10 freq. response in 1:8 applications with nondifferential amplifier input, the internal
Faraday shield must be tied to one of the source lines (the UTC LS-10 does not have any Faraday shield).
The two coils structure results in a high immunity to external magnetic fields from e.g. power supplies and motors.
Primary and secondary windings are separated by electrostatic shields. The core is a high permeability mu metal core.
The transformer is housed in a mu-metal can.
Turns ratio:                                             1 + 1 : 4 + 4
Pin layout (viewed from component side) and winding schematics:
1                   10
5               10
4                 9                    2                   9
LL1922
Top view    8                    5                   6
2                 7
1                 6                    4                   7
8
Dimensions     (L x W x H above PCB, in mm)               47 x 28 x 24
Spacing between pins                                      5.08 mm  (0.2")
Spacing between rows of pins                              35.56 mm  (1.4")
Rec. PCB hole diameter:                                   1.5 mm
Weight:                                                   115 g
Static resistance of each primary:                        60W
Static resistance of each secondary:                      730W
Distortion  (primaries connected in series, source        + 21 dBU  0.1% @ 50 Hz
impedance 600W, load 47k. Primary signal level)):         + 26 dBU  < 1  %  @ 50 Hz
Distortion    (primaries connected in parallel source     + 11 dBU  0.1% @ 50 Hz
impedance 600W, load 47k. Primary signal level))::        + 19 dBU  < 1  %  @ 50 Hz
Frequency response (source 600W, load 47 kW,
Connected 1:4 (fig 3), primary level +10dBU        10 Hz -50 kHz +/- 1.0 dB
Connected 1:8 (fig 4), primary level +10dBU        10 Hz -30 kHz +/- 1.0 dB
Connected 1:8 (fig 5), primary level +10dBU        10 Hz -30 kHz +/- 1.0 dB
Isolation between windings/ between windings and shield:   4 kV / 2 kV
Connection alternatives and suggested applications:
1:4 line input stepup                            1:8 line input stepup
+             (fig 3)                                          (fig 4)
5               10       +                  5               10        +
4                 9                         4                 9
LL1922             to diff                   LL1922            to diff
amp
amp
Top view    8                               Top view    8
2                 7                         2                 7
1                 6                 +       1                 6
+
5               10        to non-
1:8 line input stepup                4      LL1922     9       differential
to non-differential amp                     Top view    8       amp
(UTC LS-10 style, not using the           2                 7
internal Faraday shield for CMR)   +      1                 6
(fig 5)
R031024