Трансформатор LUNDAHL LL1941. 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
LL1941
LL1941 is a high turns ratio version of our LL1931 moving coil step-up transformer. The LL1941 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, for low output MC
cartridges. 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 : 16 + 16
Pin layout (viewed from component side) and winding schematics:
1                   10
5               10
4                9                     2                   9
LL1941
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:                                               90 g
Static resistance of each primary:                    0.8 ?
Static resistance of each secondary:                  105 ?
Frequency response (serial connection, source 10 ?,    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 : 16            Parallel-serial connection  1:32
+      5               10                                            10
5
4     LL1941      9                           4     LL1941      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.
R101123