Lundahl Telephone hybrid transformer, LL6702

Hybrid Transformer LL6702

LL6702 is a hybrid transformer for telephone applications. It is built using a C-core, and meets requirements for high isolation between windings. The LL6702 has an extremely low leakage inductance and thus a flat frequency response curve. This makes it easy to design the balancing network for good transhybrid loss in the entire frequency range.

Turns ratio: 1.5 , 1.5 : 1 + 1
Dims (Length x Width x Height above PCB (mm)): 47 x 31 x 15

Spacing between pins: 5.08 mm (0.2")
Spacing between rows of pins: 30.48 mm (1.2")
Weight: 70 g
Rec. PCB hole diameter: 1.5 mm
Static resistance of primary (pins 1 - 4 ): 50?
Static resistance of balance (pins 2 - 5 ): 45?
Static resistance of each secondary (pins 6 - 7, 9 - 10 ): 36?
Max. DC current: 60 mA
Transhybrid loss (laboratory conditions): 50 dB, 10 Hz - 10 kHz
Isolation between primary and balance windings/ between primary and secondary windings: 2 kV / 4 kV