Трансформатор LUNDAHL LL1517. Инструкция на английском языке

Tibeliusgatan 7                        International    Domestic
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Audio Output Transformer
LL1517
LL1517 is an audio output transformer for balanced or unbalanced drive. The transformer is built from two three-
section coils, with primaries and secondaries separated by electrostatic shields, and a audio C-core of our own
production. The transformer is housed in a mu-metal housing.
The LL1517 has sufficient low copper resistance to meet broadcast specifications in a conventional drive
configuration, but is  (as all output transformers) ideally used with mixed feedback drive circuits. (See separate
paper for mixed feedback design principles).
Turns ratio:                                                    1 + 1 : 1 + 1
Dims (Length x Width x Height above PCB (mm)):                  47 x 34 x 18
Pin layout (viewed from component side) and winding schematics:
1                7
6               12
2
5               11
4                               3                8
LL1517
3   (top view)  9
6                12
2                 8
5
1                 7
4                11
9
Spacing between pins:                                           5.08 mm  (0.2")
Spacing between rows of pins:                                   35.56 mm  (1.4")
Weight:                                                         105 g
Core:                                                           Audio C-core
Housing:                                                        Mu-metal
Rec. PCB hole diameter:                                         1.5 mm
Static resistance of each primary:                              9.2 W
Static resistance of each secondary:                            9.5 W
Leakage inductance of secondaries (sec. in series):             0.3 mH
No-load impedance:                                              >1kW @ 50 Hz, +20 dBU
Optimum source impedance:                                       Minus 18 W  (See above)
Balance of output (according to IRT, source < 10 W , Load 600 W):  > 60 dB
Maximum output level before saturation (sec. in series, load 600 W)  +  24 dBU @ 30 Hz
Distortion  (achieved with mixed feedback drive circuit, load 600 W)  < 0.03 % @ 20 dBU, 30Hz
Frequency response (source  10 W,  load 600 W):                 10 Hz -- 80 kHz +/- 0.3 dB
Loss across transformer (at midband with 600 W load):           0.3 dB
Isolation between primary and secondary windings / between
windings and core:                                              4 kV / 2 kV
Suggested use
6               12
5               11
4    LL1517
3               9
2                8
1                7
R980616