Mono-Block Tube Amplifier
- 5 tubes
- Class AB (‘ish, not quiet class AB, closer to class B)
- EL34 outputs
- Approx. 50 Watts RMS output power
- 10 Hz to 25 KHz -3 dB bandwidth
- 0.65 % THD
- Direct grid bias on output tubes
This mono-block tube amplifier is one of 5 that were developed for the vacuum tube home theater system. It is the same design as is shown in the quad tube amplifier with the exception that it utilizes a smaller power supply. In designing this amplifier i have attempted to squeeze as much power as I can out of a pair of EL34 pentodes while still maintaining high fidelity performance resulting in a bandwidth of 10 Hz to 25 KHz and a THD of 0.65 % while achieving a peak output power of approximately 50 watts RMS.
Engineering Notes, Schematics, and Plots
Caution! High voltage. Do not attempt to build anything shown here unless you have taken proper high voltage training. The high voltages present in these tube designs are deadly.