6L6 single ended tube amp

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6L6 single ended tube amp

The 6L6 simple SE

Even though 6L6 tube is used primary in guitar vacuum tube amplifiers, many manufacturers use this tube in audiophile designs. I decided to build this small single ended amplifier based on 6L6 vacuum tube using a classic three stage single ended design.
The plate voltage is about 320 Volts and the output stage is a classic single-ended cathode follower. Output transformer is 4500 ohms and is set for 8 ohm speakers. We chose this design for one reason : Wiring this tube as tetrode we achieve the greater possible amplification as a result of higher grid transconductance.
Click to the picture below to see more photos and the Schematic.

  • one 6L6 tube / channel
  • simple construction
  • excellent damping factor (Z)output
  • pure class A
  • 320 Volt plate voltage

This project is a DIY single ended amplifier designed by Christos Spathopoulos

Data :
L3(Mains Transformer in this project) : 150-0-150V / 170mA
Choke : 7H/150mA
Output Transformer 4500ohms primary

This is the final modified schematic (one channel)

6L6SE-modified-schematic

6L6SEPSU-schematic

6L6-curves

6L6-single-ended-36L6-single-ended-4

6L6-single-ended-5

6L6-single-ended-6

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