Трансформатор LUNDAHL LL1555. 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 Output Transformer
LL1555
LL1555 is an audio output transformer for balanced drive. The winding arrangement is such that, connected as shown
below, each secondary winding is surrounded by cold primary winding ends. The transformer is ideally used with a
mixed feedback drive circuit (refer to our separate sheet).  The secondaries can be connected in parallel (for low output
impedance) or in series.
The LL1555 is made with an audio C-core of our own production and is housed in a mu-metal housing.
Turns ratio:                                             1 + 1 + 1 + 1 : 1 + 1
Dims: (Length x Width x Height above PCB (mm))           33 x 26x 20
Pin Layout (viewed from pins side) and Windings Schematics:
1
2                    9
3                    10
1                9
2               10                     4
3               11
4
5               13                     8
6               14
7               15                     7                    16
8               16
6                    15
5
Can + Core  13
Spacing between pins:                                    2.54 mm  (0.1")
Spacing between rows of pins:                            22.86 mm  (0.9")
Weight:                                                  59 g
Rec. PCB hole diameter:                           1.5 mm
Static resistance of each primary (average):             120 W
Static resistance of each secondary (average):           75 W
Max. primary level (primaries connected as below):  +27 dBU @ 50 Hz
Leakage inductance of secondaries (sec. in series):  1.0 mH
No-load impedance(primaries connected as below):         >2kW @ 50 Hz, @+14 dBU primary level
Balance of output (according to IRT, source < 10 W , Load 600 W) > 60 dB
Frequency response (source  10 W,  load 600 W):          10 Hz -- 40 kHz +/- 0.3 dB
Isolation between primary and secondary windings/
between windings and core:                               4 kV / 2 kV
Suggested usage
+                                                +
+              1               9                 +              1               9
2              10                                2              10
3              11                                3              11
4    LL1555                                      4    LL1555
-              5   (pin’s side  13               -              5   (pin’s side  13
6     view)    14                                6     view)    14
7              15                                7              15
8              16                                8              16
1 : 1                                            2 : 1
Max. output level +27 dBU @ 50 Hz                Max. output level +21 dBU @ 50 Hz
Primary resistance 120 W                         Primary resistance 120 W
Secondary resistance 150 W                       Secondary resistance 37 W
R970729