Lundahl 5402 transformer

Turns ratio: 2 + 2 : 1 + 1

Dims (Length x Width x Height above PCB (mm)): 43 x 28 x 21

Pin layout (viewed from component side) and winding schematics:

Spacing between pins: 5.08 mm (0.2")

Spacing between rows of pins: 30.48 mm (1.2")

Weight: 92 g

Rec. PCB hole diameter: 1.5 mm

Static resistance of each primary: 30 W

Static resistance of each secondary: 7 W

Leakage inductance of secondaries (sec. in series): 0.2 mH

No-load impedance: >800 W @ 50 Hz, +20 dBU

Optimum source impedance: Minus 15 W (See application below)

Balance of output (according to IRT, source < 10 W , Load 600 W): > 60 dB

Distortion (connection as application example below, load 600 W) + 22 dBU 0.1% @ 50 Hz

Frequency response (as below , load 600 W): 20 Hz -- 40 kHz +/- 0.3 dB

Voltage loss across transformer (at midband with 600 W load): 0 dB

Isolation between primary and secondary windings / between

windings and core:

4 kV / 2 kV