Lundahl 1676 amorphous core 1+1:2+2. In this test the transformer is wired as a 2:1+1 by putting the 2+2 secodaries in parallel and using the transformer "backwards". This configuration allows the LL1676 to be used as the input/phase splitter transformer in a P-P amplifier without steping the voltage up or down.

Frequency response

Impedance into 20kΩ load

Distortion at 1Vrms

Distortion at .1Vrms

Distortion at .01Vrms