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Инструкция LUNDAHL LL1689

Инструкция ФорматPDF Размер0,04 МБ Страниц2 КатегорияИнструменты / Контрольно-измерительные приборы ДобавилOlegTech76

Инструкция для LUNDAHL LL1689 на русском языке. Документ можно использовать для ознакомления с информацией, относящейся к данной модели.

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Line Output Transformer LL1689
LL1689 is a line output transformer for tube amplifiers. The transformer is available with different core air gap
for PP or SE drives.
The transformer primaries are wound with a special low capacitance winding technique to achieve best high
frequency performance. The transformer has a special high flux, low distortion audio C-core of our own
production.
The LL1689PP is assembled with a small core air gap to allow for some DC current unbalance.
For the S.E. versions of the LL1689, the core air gap is chosen such that the denoted DC current (18mA for a
LL1689/18mA) generates a no signal core flux density of 0.9 Tesla when used with all primaries in series. This
leaves a flux density swing of 0.7 T for the signal.
Winding schematics, physical dimensions, pin and mounting hole layout (all dimensions in mm)
Weight Turns ratio Static resistance,
winding A
Static resistance,
winding B
Static resistance,
winding C
0.75 Kg 9+9 : 1+1+1+1
19 Ω 15 Ω 655 Ω
Max. current through any primary (“C”) section: 50 mA
Isolation between primary and secondary windings / between windings and core: 4 kV / 2 kV
Type
LL1689/PP LL1689/PP LL1689/PP LL1689/18mA
Connection Alt M
PP to Line Out.
9+9 : 4
Alt N
PP to Line Out.
9+9 : 2
Alt O
PP to Line Out.
9+9 : 1
Alt P
SE to Line Out.
18 : 4
Primary DC current for 0.9
Tesla
- - - 18 mA
Primary Inductance 290 H 290 H 290 H 90H
Freq. Response (+/-1dB) @
source impedance (*)
Secondaries open
Hz – kHz
15kΩ
15kΩ
15 kΩ
3 kΩ
Max sec. voltage
@ 30 Hz
128V r.m.s. 64V r.m.s. 32V r.m.s. 56 V r.m.s.
Type
LL1689/18mA LL1689/18mA
Connection Alt Q
SE to Line Out.
18 : 2
Alt R
SE to Line Out.
18 : 1
Primary DC current for 0.9
Tesla
18 mA 18 mA
Primary Inductance 90H 90H
Freq. Response (+/-1dB) @
source impedance (*)
Secondaries open
3.5kΩ
3.5kΩ
Max output
voltage @ 30 Hz
28 V r.m.s. 14 V r.m.s.
73
Bottom view
4 x M3
Mounting holes
36
56
53
61
LUNDAHL
TRANSFORMERS
Tibeliusgatan 7 International Domestic
S-761 50 NORRTÄLJE Phone +46 - 176 13930 0176-13930
SWEDEN Fax +46 - 176 13935 0176-13935
2
3
4
5
7
8
9
10
13
16
18
21
13
16
4
3
5
2
21
18
A
B
8
9
B
7
10
A
C
C
R040407
(*) The source impedances used
in the tables indicates a
recommended upper limit,
unless freq. response can be
compromised.
At lower source impedance
resonance peaking will occure.
It can be reduced using
secondary load resistors.
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