Turns ratio 1+1 : 1+1
The LL2753 is a three-section dual coil C-core tube amplifier interstage transformer.
The coil is wound using our low capacitance, high internal isolation technique with internal multilayer isolation foil where layer-to-layer signal voltage is big. Winding order is chosen to minimize destructive capacitive energy buildup between primary and secondary sections.
The core is an audio C-core of our own production.