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2SK135 Single-Ended 1

Amplifier & Power Supply

Schematic by Jean Hiraga published in "L'Audiophile" named Némésis.

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2SK135 Single-Ended 2

Amplifier

Schematic by Pierre Johannet published in "L'Audiophile" based on Hiraga's Némésis.
The power supply is identical to the compensated version.

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2SK135 Single-Ended 3

Amplifier

Schematic by Pierre Johannet published in "L'Audiophile" named Super Némésis Compensated.
To allow a better bass response and tough use an output trafo without an air gap (higher primary inductance) It uses a second primary to avoid the magnetic core saturation. This second primary is powered (without any signal) by a second 2SK135, the current flowing in the opposite way cancels the magnetic field of the first primary.
In the prototype, he used a toroidal power supply transformer (Metalimphy 2x110V/2x40V, 300VA). Only one secondary was used.
You can also use an audio output transformer 2x64Ohms/8Ohms *without* an air gap.

Such an idea could also be used in tubes circuits.

Power Supply

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