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.
How to reduce the input sensitivity of the tube amplifier
How to calculate a voltage divider to reduce the input to the valve amplifier
One year of operation of the 1955 Tube Amp with no breakdowns.
It’s been over a year and a half using the first built 1955 model tube audio amp 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.
Performance measurements on the Model 1955 (Mullard 3-3) tube amp
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.