Self-made 6V6 beam tetrode vacuum tube amplifier

This is a slightly modified version of a 6V6 beam tube single amplifier designed by Mr. Ichiro Aki.

The circuit was refined by Mr. Aki over a long period, and I believe the sound quality is truly impeccable.
The drawback mentioned by Mr. Aki in his work, that the hum on the right side became slightly louder, was resolved by changing the layout of the parts and wiring, and by separating the power supply and amplification sections as much as possible.
Therefore, although the appearance is completely different from the original design, the circuit is the same.

Specifications:
Vacuum Tubes Used:
First Stage: 12AT7 x 2
Output Stage: 6P6S (equivalent to 6V6) x 2
Input: RCA terminals R/L 1 system
Output: SP terminals R/L 1 system (8Ω)
3W x 2
Dimensions: 33(W) x 23(D) x 13(H) cm (approx.)

Based on listening tests, it delivers the realistic sound of a single amplifier while maintaining a well-balanced sound comparable to modern digital amplifiers.
I was most impressed by the perceived S/N ratio. In the absence of a signal, no noise can be heard regardless of the volume position.
Because of its high sound quality, I believe it can be used with any genre of music.
However, with an output of 3W, you may feel a lack of power in a large room.

This set includes the main unit, four vacuum tubes, and a temporary power cable.

Please feel free to consult with me if you would like to change the vacuum tubes.

If you have any questions, please feel free to comment.

Thank you.