Трансформатор LUNDAHL LL1931. 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
Amorphous Core Moving Coil Input Transformer
LL1931
LL1931 is a high performance moving coil step-up transformer. The transformer combines our unique uncut
amorphous cobalt core and our dual coil structure with Cardas high purity copper wire in an oversized design. The
objective is to provide the best possible MC transformer, cost-no-object. 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
LL1931
Top view    8                   5                 6
2                7
1                6                   4                 7
Can + core  8
Dimensions    (L x W x H above PCB, in mm)        43 x 28 x 22
Spacing between pins                              5.08 mm  (0.2")
Spacing between rows of pins                      30.5 mm  (1.2")
Rec. PCB hole diameter:                           1.5 mm
Weight:                                           80 g
Static resistance of each primary:                1.8 ?
Static resistance of each secondary:              105 ?
Frequency response (serial connection, source 50 ?,    10 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     LL1931     9                          4     LL1931     9
Top view    8                               Top view    8
2                7                          2                7
1                6       +          +       1                6      +
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.
R090627