Lundahl Interstage transformer, LL1621-20mA

Noninverting Drive Transformer for Tube Amplifier Output Stage LL1621-20mA

LL1621 is a noninverting high inductance drive transformer for tube amplifier output stages. The transformer has a special audio C-core of our own production, and the coil is made using a low capacitance coil winding technique. LL1621 is available in Push-pull and Single-end versions.

Turns ratio: 1 + 1 : 1+1

Weight: 0.5 kg
Static resistance of each primary (average) 445 ?
Static resistance of each secondary (average) 455 ?
Recommended primary DC current, primaries in series: 20 mA
Maximum DC current before saturation, primaries in series: 35 mA
Primary inductance (primaries in series) > 30 H

Isolation between primary and secondary windings / between windings and core: 4 kV / 2 kV