If you ever wanted to build your own tube amplifier but you were intimidated by working with high voltages, [Marcel]’s low-voltage tube amp design might spark your interest. The design operat… ...

[Mikremk] demonstrates this with a simple but effective amplifier using a PCL82 triode-pentode. It’s a conventional tube amplifier circuit in which the triode is a preamplifier for the pentode ...

The schematic shows one channel of a stereo amplifier, and the power supply is sufficient for both channels. Transformer T2 supplies the voltages required for the vacuum tube plates. Selection of the ...

Some might call me “lazy,” but I like to call it “being efficient with my time.” I simply took the tube-boffins’ audio amp schematic and deleted everything but the 12AX7 tube and the ...

Both balanced XLR and unbalanced inputs are supported. The McIntosh 50th Anniversary MC275 tube amp is accompanied by a commemorative booklet and carries a suggested retail price of US$6,500.