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PROBLEM SOLVERS WITH MOUNTED CONNECTORS
TYPE
TURNS RATIO
LEVEL (50hZ)
USAGE
LL6810-phmphm
1:1
+15dBU
Isolation transformer unit Phono- Phono w. 6 ft cable
LL156X-3FX3MX
1:1
+24dBU
XLR inline input transformer unit. XLR female to XLR male
LL156X-3FXPHM
1:1
+24dBU
XLR inline input transformer unit. XLR female to Phono male
LL156X-3FXNP2C
1:1
+24dBU
XLR inline input transformer unit XLR female - 1/4"pole
LL156X-PHF3MX
1:1
+24dBU
XLR inline input transformer unit Phono female - XLR male
LL1584-3FX3MX
1:1
+16dBU

XLR inline 600 Ohms: 600 Ohms isolation unit XLR female to XLR male Also available as 3FXPHM and 3FXNP2C

 

GENERAL PURPOSE TRANSFORMERS (FOR APPROX. 600 OHMS IMPEDANCE LEVEL)
TYPE
TURNS RATIO
LEVEL (50hZ)
USAGE
LL1527
1+1:1+1
+16dBU
Split 1: 1 direct + 1 isolated. Ground isolation
LL1527A
1+1:1+1
+16dBU
Split 1: 1 direct + 1 isolated. Ground isolation
LL1527XL
1+1:1+1
+19dBU
Split 1: 1 direct + 1 isolated. Ground isolation
LL1532
1+1:2
+10dBU
Mic input. Ground isolation.
LL1570
1+1:1+1
+16dBU
Split 1: 1 direct + 1 isolated. Ground isolation
LL1570XL
1+1:1+1
+19dBU
Split 1: 1 direct + 1 isolated. Ground isolation
LL1581XL
1:1+1
+13dBU
Splitting 1:1 direct + 2 isolated
LL1583
1:1+1
+ 8dBU
Splitting 1:1 direct + 2 isolated. Small size.
LL7902
1+1+1+1:1+1+1+1
+28dBU
For demanding applications
LL7904
1:1+1
+22dBU
High level splitting 1:1 direct + 2 isolated

 

LINE INPUT TRANSFORMERS
TYPE
TURNS RATIO
LEVEL (50hZ)
USAGE
LL1531
1+1:1+1
+20dBU
Line input. Small size
LL1540
1+1:1+1
+30dBU
Line input.
LL1545A
1+1+1+1:2+2
+24dBU
Wide bandwidth line input
LL1544A
1+1+1+1:2+2
+20dBU
Amorphous core
LL6404
1:1
N/A (High!)
Zero Field input
LL7101
1+1:1,37
N/A (High!)
Zero Field input
LL7901
1+1+1+1:1+1+1+1
+34dBU
For very high level applications

 

MICROPHONE INPUT TRANSFORMERS
TYPE
TURNS RATIO
LEVEL (50hZ)
USAGE
LL1528
1+1:2,5+2,5
+16dBU
200 Ohm : 5 kOhm
LL1530
1+1:3,5+3,5
+16dBU
DI 10 k Ohm: 200 Ohm.
LL1538
1+1:5
+16dBU
200 Ohm: 5 kOhm*
LL1538XL
1+1:5
+19dBU
High level 200 Ohm : 5kOhm*
LL1550
1+1+1+1:4+4
+12dBU
200 Ohm : 1 kOhm --200 Ohm:10 kOhm. Amorphous core
LL1571
1+1:1,75+1,75
+16dBU
200 Ohm : 2,5 Ohm
LL1576
1+1:7
+16dBU
200 Ohm : 10 kOhm*
LL1577
1+1:14
+10dBU
50 Ohm : 10 kOhm*
LL1578
1+1:10
+10dBU
50 Ohm : 5 kOhm*
LL1578XL
1+1:10
+13dBU
High level 50 Ohm : 5 kOhm*
LL1636
1+1+1+1:10+10
- 2dBU
High turn´s ratio input. Amorphous core
LL7903
1+1+1+1:2+2+2+2
+28dBU
High level mic/line input.
LL9206
1+1+1+1:10+10
- 2dBU
High turn´s ratio input. Amorphous core. For moving coil pickup.
Transformers marked with * have compatible pinout

 

LINE OUTPUT TRANSFORMERS
TYPE
TURNS RATIO
LEVEL (50hZ)
USAGE
LL1517
1+1,ct:1+1
+28dBU
With Faraday shields. General purpose.
LL1524
1+1:1+1
+28dBU
Balanced drive. Extra wide freq. range
LL1539
2:1+1
+31dBU
Balanced drive
LL1555
1+1+1+1:2+2
+27dBU
Balanced drive
LL1560
2+2:1+1+1+1
+26dBU
Balanced drive. 4 output active split.
LL1582
1+1:1+1
+30dBU
With Faraday shields. General purpose. Dimensions optimized for Euroboard
LL2811
1+1:1+1
+30dBU
Balanced drive. Dimensions optimized for Euroboard
LL5402
2:1+1
+22dBU
Unbalanced drive
LL7401
1+1:1+1
+24dBU
Balanced drive. Low profile. Extra wide freq. range.

 

MISCELLANEOUS TRANSFORMERS
TYPE
TURNS RATIO
LEVEL (50hZ)
USAGE
LL1566
110:110 Ohm
N/A
Digital Audio
LL1574
110:75 Ohm
N/A
Digital Audio
LL1575
1:1
Composite video isolation
LL6702
N/A
N/A
Telephone hybrid transformer

 

TUBE AMPLIFIER TRANSFORMERS
TYPE
USAGE
COMMENT
LL1620
Loudspeaker output transformer
3,3k, 6,0k or 11,5k primary impedance
LL1621
Non-inverting interstage transformer
Grid choke
LL1623
Loudspeaker output transformer
1,6k, 3,0k or 5,6k primary impedance
LL1627
Loudspeaker output transformer
650 Ohms, 1,2k or 2,3k primary impedance
LL1648
Mains transformer
LL1649
Mains transformer
LL1650
Mains transformer
LL1651
Mains transformer
LL1660
Interstage / Line output transformer
Various connection alternatives
LL1663
Loudspeaker output transformer
5k primary, 8 Ohm output
LL1664
Loudspeaker output transformer
3k primary, 8 Ohm output
LL1667
Tube anode choke
DC current 15 mA
LL1668
Tube anode choke
DC current 25 mA
LL1669A
Mains transformer
With grid offset voltage winding
LL1670
Grid choke
Grid choke 0.8 mA
LL1671
Interstage / Line output transformer
High current version of LL1660