Lundahl Tube amplifier output transformer, LL2750-25mA

Small size tube amplifier output transformer LL2750 10k : 8 ohms

The LL2750 is a small size 2 x 4 -sectioned, dual coil C-core tube amplifier output transformer for 10k : 8 ohms impedance ratio available in PP and SE versions. The coils are wound using our standard high internal isolation technique with isolation foil between each copper layer. The core is an audio C-core of our own production.

Turns ratio 18+18 : 1+1 or (6+12)+(6+12) : 1 + 1

Weight: 0.75 kg
Static resistance of each primary: 575 ?
Static resistance of secondary (connected in parallel as below): 1.0 ?
Isolation between windings / between windings and core: 4 kV / 2 Kv
Max recommended DC current through any primary winding: 65mA (7W heat dissip)

Frequency response LL2750/40mA, connected as SE (below), source 3.3k, load 8 ohms: 12Hz 40kHz +0dB, -3dB (re. 1kHz)