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Line Input Audio Transformers

 
     
 
Line Input Audio Transformers
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High quality audio transformers for bridging input or for Zero Field input circuits.

General properties:
• PCB mount style
• High level capability
• Excellent magnetic and electrostatic shielding
• High mu cores (mu metal or amorphous strip core)

 
     
 
Type
Turns Ratio
Size
(LxWxH mm)
Max Prim. Level. 1% dist, 50Hz (Prim. in series)
Comments  
 
LL1531
1+1 : 2
28x17x15
+20 dBU
Small size
Lundahl, General Porpuse Transformers, LL1527
 
LL1540
1+1 :1+1
38x24x17
+30 dBU
High level input
Lundahl, General Porpuse Transformers, LL1527
 
LL1544A
1+1+1+1 : 2+2
30x22.5x14.5
+20 dBU
Amorphous strip core. General purpose with many connection alternatives. Replaces LL1544
and LL1554
Lundahl, General Porpuse Transformers, LL1527
 
LL1545A
1+1+1+1 : 2+2
38x24x17
+22 dBU

General purpose with many connection alternatives. Replaces LL1545

Lundahl, General Porpuse Transformers, LL1527
 
LL1592
1+1 : 1+1
47x28x20
+31 dBU
High level line input transformer for extra demanding applications
Lundahl, General Porpuse Transformers, LL1527
 
LL7101
1+1 : 1.4
28x18x10
N/A (Very high)
For Zero Field input circuitry (see datasheet)
Lundahl, General Porpuse Transformers, LL1527
 
LL6404
1 : 1
15.5x11x10
N/A
Very small size. For Zero Field input circuitry (see datasheet)
Lundahl, General Porpuse Transformers, LL1527
 
LL7901
1+1+1+1 : 1+1+1+1
66x32x21
+34 dBU
Very high level, high impedance input.
Lundahl, General Porpuse Transformers, LL1527
 
LL7902
1+1+1+1 : 1+1+1+1
66x32x21
+28 dBU
General purpose. Very high quality line input for step-down or step-up
Lundahl, General Porpuse Transformers, LL1527
 
LL1922
1+1 : 4+4
47x28x24
+26 dBU
High level stepup line input. Similar to the
UTC LS-10.
Lundahl, General Porpuse Transformers, LL1527