Трансформатор LUNDAHL LL1531. Инструкция на английском языке

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Input Transformers
LL1531 and LL1532
LL1531 is a small size, high impedance line input transformer.
LL1532 is a small size medium impedance mic/line input transformer.
The transformers consists of two coils each with one primary and one secondary winding separated by a
electrostatic shield. The secondaries are serially connected internally. The core is a high permeability mu-metal
core.
Being a high impedance transformer, the LL1531 should normally be used with primaries connected in series.
The LL1532 can be used with primaries in series or in parallel.
The transformers are magnetically shielded by a mu-metal case.
Turns ratio:                                             1 + 1 : 2
Dims (Length x Width x Height above PCB (mm)):           28 x 17 x 15
Pin layout  (viewed from component side) and winding schematics:
1
4        8
3                           2                   8
LL1531
2        6
(top view)                4
1        5                                      6
3                   5
Spacing between pins:                             3.81 mm  (0.15")
Spacing between rows of pins:                     20.32 mm  (0.8")
Weight:                                           25 g
Rec. PCB hole diameter:                           1.5 mm
LL1531                       LL1532
Static resistance of each primary:                 500W                          70W
Static resistance of secondary:                    1.3kW                        180W
Distortion (primaries connected in series,  + 10 dBU primary level, 50 Hz:  + 0 dBU primary level, 50 Hz:
source impedance 600W ):                           0.2 %                        0.2 %
+ 20 dBU primary level, 50 Hz:  + 10 dBU primary level, 50 Hz:
1 %                           1 %
Self resonance point :                            > 80 kHz                    > 200 kHz
Optimum termination for best square-wave   8 kW in series with 1.2 nF   2 kW in series with 1.6 nF
response (source imp.  600W ) :
Frequency response                         10 Hz - 25 kHz +/- 0.3 dB    10 Hz - 50 kHz +/- 0.3 dB
(source and load as above)
Isolation between windings/ between windings and shield:  3 kV / 1.5 kV
R980618