Трансформатор LUNDAHL LL1690. 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
Amorphous Core High Level Line Input Transformer
LL1690
LL1690 is a high-level line input  transformer with an uncut cobalt-based amorphous strip core. The transformer is
designed for high end audio applications such as tube amplifier line input with or without phase splitting. The
windings are arranged to give a high degree of symmetry if the transformer is used for phase splitting. The dual-coil
structure also greatly improves immunity to external magnetic fields from e.g. power supplies and motors. Primary
and secondary windings are separated by electrostatic shields.. The transformer is housed in a mu-metal can.
Turns ratio:                                             1 + 1 : 1 + 1
Pin layout (viewed from component side) and winding schematics:
1                   10
5               10
4                 9                    2                   7
LL1690
3     Top view                         5                   6
2                 7
1                 6                    4                   9
3
Dimensions     (L x W x H above PCB, in mm)           42 x 28 x 22
Spacing between pins                                  5.08 mm  (0.2")
Spacing between rows of pins                          30.5 mm  (1.2")
Rec. PCB hole diameter:                               1.5 mm
Weight:                                               81 g
Static resistance of each primary:                    150 W
Static resistance of each secondary:                  150 W
Distortion    (primaries connected in series,         + 23 dBU  0.1% @ 30 Hz
source impedance 600W ):                + 26 dBU  < 1  %  @ 30 Hz
Self resonance point:                                 > 150 kHz
Suggested load for best square wave response, serial-serial   40k // 7k + 400pF
connection.
Frequency response (serial connection , source 1kW,    10 Hz -- 100 kHz +/- 1.0 dB
load 40 kW in parallel with 7k + 400pF):
Phase splitting balance (connection 2:1+1. Source 1kW,    >55dB, 10Hz – 50kHz
load (20kW +20kW) in parallel with 7k + 400pF):,
Phase response (deviation from linear phase)          20 Hz – 20kHz, < 2°
(source 600 ohm, load 10k (Audio Precision))
Isolation between windings/ between windings and shield:   3 kV / 1.5 kV
Connection alternatives and suggested applications:
Serial-serial connection (1 : 1) for high level line input   Phase splitting for 2 : 1+1 input
+                                             +
5               10     Centertap               5                10
4     LL1690      9                            4                 9
LL1690
3     Top view                                 3     Top view
2                 7                            2                 7
1                 6      +                     1                 6        +
5               10
Phase splitting for          4     LL1690      9
1 : 1+1 input             3     Top view
2                 7
+
1                 6       +
R040113