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Инструкция LUNDAHL LL9226

Инструкция ФорматPDF Размер0,05 МБ Страниц2 КатегорияИнструменты / Контрольно-измерительные приборы ДобавилSofiaДок91

Инструкция для LUNDAHL LL9226 на русском языке. Документ можно использовать для ознакомления с информацией, относящейся к данной модели.

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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:
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 Ω
Static resistance of each secondary (average):
130 Ω
Frequency response
(@ -10 dBU, Connection “A”, source 50Ω , load 100 kΩ) :
10 Hz -- 50 kHz +/- 1 dB
5 Hz -- 100 kHz +/- 1.5 dB
Distortion (primaries connected in series, source impedance 40Ω ):
< 0.5% @ -2 dBU, 50 Hz
Primary no load impedance @ 0 dBU, 50 Hz, all in series:
3 kΩ 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.
Termination alternatives are shown on the next page
Termination
Alternative
Turns
ratio
Copper Resistance
prim/sec
Suggested use for best
frequency response
A 1:5
20 Ω / 260 Ω MC cartridge < 100 Ω
B 1:5
5 Ω / 65 Ω
Not recommended
C 1:10
5 Ω / 260 Ω MC cartridge < 50 Ω
D 1:10
1 Ω / 65 Ω
Not recommended
E 1:20
1 Ω / 260 Ω MC cartridge < 25 Ω
1 9
2
3
4
5
6
7
8
10
11
13
14
15
16
4
3
2
1
5
6
7
8
1
5
16
1
0
9
Can + Core 13, 14
LUNDAHL
TRANSFORMERS
Tibeliusgatan 7 International Domestic
S-761 50 NORRTÄLJE Phone +46 - 176 13930 0176-13930
SWEDEN Fax +46 - 176 13935 0176-13935
Application hint:
As the LL9226 does not have
Faraday shields, both sides of
the transformer should have a
common ground reference.
R090828
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