Трансформатор LUNDAHL LL9226. 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
Moving Coil Input Transformer
LL9226
LL9226 is an MC transformer based on (and pin compatible with) our classic LL9206, but with reduced copper
resistance and level capability. The new design has resulted in an even better frequency response but still with
enough no load impedance to maintain the LF bandwidth. The transformer is built up from two coils, each coil
with one secondary winding surrounded by two primary windings. Advantages with this structure are excellent
frequency response and high immunity to surrounding magnetic fields. All winding ends are available on the
pins. Thus, the transformer can be used with a set of different turns ratios.
The LL9226 core is our cobalt based uncut amorphous strip core.  The transformer is housed in a mu metal can.
Turns  ratio:                                            1 + 1 + 1 + 1 : 10 + 10
Dims: (Length x Width x Height above PCB (mm))           30 x 22.5 x 14.5
Pin Layout (viewed from pins side) and windings schematics:
1
2                    9
3                    10
1                9                       4
10
2               11
3
4                                        8
5               13
6               14                       7                    16
7
15
8               16
6                    15
5
Can + Core  13, 14
Spacing between pins:                                           2.54 mm  (0.1")
Spacing between rows of pins:                                   22.86 mm  (0.9")
Weight:                                                         29 g
Rec. PCB hole diameter:                                         1.5 mm
Static resistance of each primary (average):                    5 ?
Static resistance of each secondary (average):                  130 ?
Frequency response                                              10 Hz -- 50 kHz +/- 1 dB
(@ -10 dBU, Connection “A”,  source 50?  , load 100 k?) :
5 Hz -- 100 kHz +/- 1.5 dB
Distortion (primaries connected in series, source impedance 40? ):   <  0.5% @ -2  dBU,  50 Hz
Primary no load impedance @ 0 dBU, 50 Hz, all in series:        3 k? typically
Core / Can:                                                     Amorphous Strip Core / Mu
metal can
Isolation between windings / between windings and core:         3 kV / 1.5 kV
Turns ratio and possible use at different termination alternatives.    Application hint:
Termination alternatives are shown  on the next page      As the LL9226 does not have
Termination   Turns   Copper Resistance   Suggested use for best    Faraday shields, both sides of
Alternative    ratio      prim/sec      frequency response          the transformer should have a
common ground reference.
A       1:5      20 ? / 260 ?     MC cartridge < 100 ?
B       1:5       5 ? / 65 ?       Not recommended
C       1:10      5 ? / 260 ?     MC cartridge < 50 ?
D       1:10      1 ? / 65 ?       Not recommended
E       1:20      1 ? / 260 ?     MC cartridge < 25 ?
R090828

LL9226 Termination Alternatives
(Left side is input if not stated otherwise)
(Pins side view)
9
1                 9                              1               10
2               10                               2      A        11
3               11                               3
4                                                4  CENTER TAP   13
5     A         13                               5               14
6               14                               6               15
7               15                               7               16
8               16                  CT           8
1                9                                1                9
2               10                                2               10
3               11                                3     B         11
4     B                             CT            4
5               13                                5  CENTER TAP   13
6               14                                6               14
7               15                                7               15
8               16                                8               16
1                9                                1                9
2               10                                2               10
3               11                                3    C          11
4     C                             CT            4
5               13                                5               13
6               14                                6  CENTER TAP   14
7               15                                7               15
8               16                                8               16
1                 9
2               10                                1                9
3               11                                2               10
11
4                                                 3
5     D         13                                4
6               14                                5    E          13
7               15                                6               14
8               16                                7               15
8               16