High-power, high-fidelity tube amplifier

A high-power, high-fidelity tube amplifier comprising:

• a plurality of output tubes including a cathode, a control grid, a screen grid and a plate, said screen grid and said plate of each output tube being electrically coupled, and said output tubes being connected in parallel to provide an output signal;
• a plurality of high transconductance driver tubes electrically connected to said output tubes as individual current sinks, said driver tubes including a cathode, a control grid and a plate, said cathode of each driver tube being electrically coupled to said control grid of a single, corresponding output tube such that an output impedance of said driver tube decreases as a grid current of said corresponding output tube increases;
• and
• a plurality of parasitic suppression components electrically coupled to said output tubes and said driver tubes.

A high-power, high-fidelity tube amplifier comprising:

• a plurality of output tubes including a cathode, a control grid, a screen grid and a plate, said screen grid and said plate of each output tube being electrically coupled, and said output tubes being connected in parallel to provide an output signal, said output tubes being configured to operate in a fixed-bias mode;
• a plurality of high transconductance driver tubes including a cathode, a control grid and a plate, said cathode of each driver tube being electrically coupled to said control grid of a corresponding output tube such that a output impedance of said driver tube decreases as a grid current of said corresponding output tube increases;
• a plurality of parasitic suppression components electrically coupled to said output tubes and said driver tubes;
• and
• bias circuitry for configuring said output tubes to operate in said fixed-bias mode, said bias circuitry comprising one resistor, one capacitor and one potentiometer for each of said output tubes.

A high-power, high-fidelity tube amplifier comprising:

• a plurality of output tubes including a cathode, a control grid, a screen grid and a plate, said screen grid an said plate of each output tube being electrically coupled, and said output tubes being connected in parallel to provide an output signal;
• a plurality of high transconductance river tubes including a cathode, a control grid and a plate, said cathode of each driver tube being electrically coupled to said control grid of a corresponding output tube such that an output impedance of said driver tube decreases as a grid current of said corresponding output tube increases, said driver tubes further including a screen grid and a suppressor grid, and wherein said screen grid, said suppressor grid and said plate of each driver tube are electrically coupled together;
• and
• a plurality of parasitic suppression components electrically coupled to said output tubes and said driver tubes.

A high-power, high-fidelity tube amplifier comprising:

• a plurality of output tubes including a cathode, a control grid, a screen grid and a plate, said screen grid and said plate of each output tube being electrically coupled, an said output tubes being connected in parallel to provide an output signal;
• a plurality of high transconductance driver tubes including a cathode, a control grid and a plate, said cathode of each driver tube being electrically coupled to said control grid of a corresponding output tube such that an output impedance of said driver tube decreases as a grid current of said corresponding output tube increases, said driver tubes comprising a plurality of triode converted pentodes;
• an
• a plurality of parasitic suppression components electrically coupled to said output tubes and said driver tubes, said parasitic suppression components comprising a plurality of ferrite beads.

A high-power, high-fidelity tube amplifier comprising:

• a plurality of output tubes connected in parallel to provide an output signal;
• a plurality of high transconductance drivers electrically connected to said output tubes as individual current sinks, each driver being electrically coupled to a single, corresponding output tube such that an output impedance of said driver decreases as a grid current of said corresponding output tube increases;
• and
• a plurality of parasitic suppression components electrically coupled to said output tubes and said drivers.

A high-power, high-fidelity tube amplifier comprising:

• a plurality of output tubes connected in parallel to provide an output signal, said output tubes being configured to operate in a fixed-bias mode;
• a plurality of high transconductance drivers, each driver being electrically coupled to a corresponding output tube such that an output impedance of said driver decreases as a grid current of said corresponding output tube increases;
• a plurality of parasitic suppression components electrically coupled to said output tubes and said drivers;
• and
• bias circuitry for configuring said output tubes to operate in said fixed-bias mode, said bias circuitry comprising one resistor, one capacitor and one potentiometer for each of said output tubes.

A high-power, high-fidelity tube amplifier comprising:

• a plurality of output tubes connected in parallel to provide an output signal;
• a plurality of high transconductance drivers, each driver being electrically coupled to a corresponding output tube such that an output impedance of said driver decreases as a grid current of said corresponding output tube increases, said drivers comprising a plurality of triode converted pentodes;
• and
• a plurality of parasitic suppression components electrically coupled to said output tubes and said drivers, said parasitic suppression components comprising a plurality of ferrite beads.