eDD - A Direct-Drive Amplifier for Electrostatic Speakers

[EDDiE]

eDD - A Direct-Drive Amplifier for Electrostatic Speakers

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Figure 5: Grounded grid triode output curves (see text).

Photo 2: The high-voltage amp PCB, top side.

Figure 6: The tube floating bias and heater supplies.

Figure 7: Voltage to current converter cathode driven circuit.

Figure 8: Optical isolator audio translation circuit.

Figure 9: Preamp, feedback, and isolation circuit.

Figure 10: High voltage power supply (pos polarity shown).

Figure 1: ESL63 transmission line circuit (see text).


Figure 12: Frequency response at the stators, from the step-up transformer (red) and equalized response from the direct drive amp (blue).


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[domician]

Видел в свое время похожую схему с оптоизоляторами, но автору хватило ума использовать высоковольтные SiC полевики.