Lundahl LL2766 - Pp, Amorphous

The LL2766 is a compact power output transformer for tube amplifiers, offered with different core air gaps for PP or SE drive. It uses a special, high-flux, low-distortion in-house-made audio C-core. The LL2766PP is built with a small core air gap to allow for some DC current imbalance, while the SE versions use an air gap chosen so that the specified DC current (50 mA for an LL2766/50 mA, for example) produces a no-signal core flux density of 0.9 Tesla when all primaries are wired in series - leaving 0.7 T of flux-density swing available for the signal.

Lundahl transformers are mainly used in the output/interstage of tube amplifiers, in microphone and line inputs, and for galvanic isolation in studio and live sound systems (DI boxes, ground-loop breakers). The Swedish manufacturer winds its own copper wire and casts its own cores for every model, resulting in very consistent, factory-measured parameters even in series production. For custom loudspeaker or amplifier builds, tube amp restorations, or premium DI box projects, Lundahl transformers provide a reference-quality foundation, and most output types are available for both push-pull and single-ended (SE) stages. The brand has earned the trust of major names across the audio industry - studios, instrument and amplifier makers - over several decades, and many designers build their circuit specifically around a Lundahl transformer because the catalogue parameters (inductance, leakage inductance, DC resistance, saturation level) are reliably reproducible from unit to unit. Before installing, it is worth double-checking the exact impedance match and the available mounting space, since size and weight can vary significantly between types.

Swedish manufacturer Lundahl Transformers AB has been hand-winding custom iron-core audio transformers for more than half a century, used by leading tube amplifier designers and studios worldwide for reference-quality signal transfer.

Package weight: approx. 1 kg.