Трансформатор LUNDAHL LL1933. 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
Moving Coil Input Transformer
LL1933
LL1933 is a high performance moving coil step-up transformer. The transformer combines our dual coil structure with
Cardas high purity copper wire in an oversized design. The objective with LL1933 is to provide an alternative for the
successful amorphous core LL1931 for those who prefer a low distortion, linear magnetization curve nickel lamination
core transformer. The dual-coil structure greatly improves immunity to external magnetic fields from power supplies,
motors etc. The transformer is housed in a mu-metal can.
Turns  ratio:                                            1 + 1 : 8 + 8
Pin layout (viewed from component side) and winding schematics:
1                   10
5               10
4                9                     2                   9
LL1933
Top view   8                     5                   6
2                7
1                6                     4                   7
Can + core  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                          35.6 mm  (1.4")
Rec. PCB hole diameter:                               1.5 mm
Weight:                                               115 g
Static resistance of each primary:                    1.5 ?
Static resistance of each secondary:                  85 ?
Frequency response (serial connection, source 50 ?,    8 Hz -- 100 kHz +/- 1.0 dB
no load / secondaries open):
Isolation between windings/ between windings and core:   3 kV / 1.5 kV
Connection alternatives:
Serial-serial connection  1 : 8            Parallel-serial connection  1:16
+      5               10                                            10
5
4     LL1933      9                           4     LL1933      9
Top view    8                                 Top view    8
2                 7                           2                 7
1                 6      +           +                          6       +
1
Cartridge is grounded through primary     Cartridge is grounded through primary
center tap. If phono preamp input is      “cold”. If phono preamp input is
unbalanced, connect pins 9 and 8 to input   unbalanced, connect pins 9 and 8 to input
ground.                                   ground.
If cartridge cable is unbalanced  (such as
a coaxial cable), ground cartridge
through pin 2 and not through pins 1+4.
R090209