Lundahl Tube amplifier output transformer, LL1693

Tube Amplifier Output Transformer LL1693

The LL1693 is a high power tube output transformer primarily for low impedance high power tubes. The transformer is built up from two coils, each consisting of 5 sections. The core is a high quality grain oriented silicon steel C-core from our own production.

Turns ratio (approx): 8 + 7 + 1 + 8 + 7 + 1 : 1+1+1+1+1+1+1+1
Static resistance of primary (all in series): 60 ? (2 x 15? + 2 x 12? + 2 x 3? )
Static resistance of inner/outer secondary winding: 0.4? / 0.5?
Primary leakage inductance (all in series): To be measured
Max recommended primary DC current (heat dissipation 12W): 450 mA
Max. primary signal voltage r.m.s. at 30 Hz (all in series): Push-Pull 530V, Single End 235V