Трансформатор LUNDAHL LL2811. 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
LL2811
LL2811 is an audio output transformer for balanced drive, with the following features:
1.  Four section winding structure for small leakage inductance.
2.  Ideally used 2 : 1 (secondaries in parallel) with e.g. NE5532 op amps for low noise.
3.  Precision made audio C core for small size.
4.  Two-coil structure and mu-metal housing for high magnetic noise immunity.
5.  Designed to fit three in a row across a Euroboard.
The secondaries can be connected in parallel for low output impedance or in series for high output level.
Turns ratio:                                             1 + 1: 1 + 1
Dims: (Length x Width x Height above PCB (mm))           31 x 26x 23
Pin Layout (viewed from component side) and Windings Schematics:
8          16                      1                    9
7           15
6           14
13                      3                  11
LL2811
3          11
2          10                      8                  16
1            9
6                  14
Can + Core 13
Spacing between pins:                                           2.54 mm  (0.1")
Spacing between rows of pins:                                   22.86 mm  (0.9")
Weight:                                                         65 g
Rec. PCB hole diameter:                                         1.5 mm
Static resistance of each primary (average):                    45 W
Static resistance of each secondary (average):                  45 W
Max. primary level (primaries in series)                        +30 dBU @ 50 Hz
Leakage inductance (windings  in series):                       <  1 mH
No-load impedance(primaries in series, primary level):          >  750 W @ 50 Hz, +20 dBU
Balance of output (according to IRT, source < 10 W , Load 600 W):  > 55 dB
Frequency response (source  10 W,  load 600 W,  0 dBU):         10 Hz -- 100 KHz +/- 0.3 dB
Isolation between primary and secondary windings/
between windings and core:                               4 kV / 2 kV
Fundamental design of driving circuitry, mixed feedback,  2:1,  suggested by A. Offenberg, NRK
+ in                           R1                                        + out
8         16
7         15
6         14
13
R                                       - out
3         11
R                         2         10
1           9
R1 is approximately 90 ohms.
Select R1 for good THD at LF and
for good square wave response.
R980626