EL84 bias issue on Mullard 3-3 tube amplifier
In the original Mullard 3-3 design the operating point of the EL84 tube is highly dependent of the amplification factor of the EF86 valve.
In the original Mullard 3-3 design the operating point of the EL84 tube is highly dependent of the amplification factor of the EF86 valve.
It has been a year of using the first model 1955 tube audio amplifier built in May 2019 that I have in my living room. The tube amp has been running two to three hours a day to listen to jazz or classical music, often connected to a raspberry computer-based Internet radio receiver with Kodi software.
New performance measurements have been made over the 1955 (Mullard 3-3) tube amplifier. You can see it on the 1955 tube amp measurements page.
Going back to the electronics of the early years, when the components and wires could be handled with bare hands.
Avoiding the use of semiconductors or printed circuit boards.
High quality parts.
Hand wired.