Трансформатор LUNDAHL LL1560. Инструкция на английском языке

Tibeliusgatan 7                        International    Domestic
S-761 50 NORRTALJE         Phone    +46 - 176 13930   0176-13930
SWEDEN                     Fax       +46 - 176 13935  0176-13935
Audio Split Transformer
LL1560
LL1560 is an audio transformer specially built for active splitting.
Each of the four secondary windings is surrounded by primary winding parts. This results in a low leakage
inductance and ensures that output signal is maintained on three of the secondary windings even if one is short-
circuited, provided of course that driving power is available.
The primary windings should be used in parallel.
Turns ratio:                                                       2 + 2 : 1 + 1 + 1 + 1
Dims: (Length x Width x Height above PCB (mm))                     47 x 34 x 23
Pin Layout (viewed from component side) and Windings Schematics (simplified):
12
1             13
11                  22
21                                   14
9                  20                        3
19
LL1560                                             15
(top view)    17                                   20
15
3                  14                     11            19
13                                   22
1                  12
9
21
Core and can  17
Housing:                                                           Mu-metal
Core:                                                              Audio C-core
Spacing between pins:                                              2.54 mm  (0.1")
Spacing between rows of pins:                                      35.56 mm  (1.4")
Weight:                                                            130 g
Rec. PCB hole diameter:                                            1.5 mm
Static resistance of each primary (average):                       120 W
Static resistance of each secondary (average):                     55 W
Secondary leakage inductance (secondaries in series, primary short circuited):   < 1 mH
Max. secondary level (each secondary)                              + 26 dBU @ 50 Hz
No-load primary impedance(primaries in parallel, primary level):   > 1 kW @ 50 Hz, +20 dBU
Balance of output (according to IRT, source 10 W , Load 600 W):     60 dB
>
Frequency response
(source  10 W,  each sec. loaded with 600 W, 0           20 Hz - 50 kHz +/- 0.5 dB
dBU sec. level):
Isolation between windings / between windings and shields:         4 kV / 2 kV
Driving circuitry, mixed feedback,  2:1+1+1+1,  suggested by A. Offenberg, NRK
+ in                          R1
11                    22
21              Out 1
9                  20
19              Out 2
R                                    17
R
15
3                  14              Out 3
13
R1 is approximately 60 ohms.                              1                  12              Out 4
Select R1 for good THD at LF and for
good square wave response
R980616