Single-Ended (SE) KT88 Tube Amp Schematic
Mikael Abdellah's Single-Ended (SE) KT88 Tube Amplifier Schematic
The popular single-ended (se) KT88 tube amplifier schematic by Mikael Abdellah. A 6DJ8 / ECC88 tube can be used in place of the 6N1P tube with good results.
Mikael Abdellah KT88 Single-Ended Tube Amplifier Schematic
Output power will be about 5W. The 470 ohm cathode resistor sets bias at a 75mA which is only about 68% of the maximum plate dissipation so expect long tube life with this amp. Choose a good quality audio output transformer with a 5k primary and rated for at least 10W. With various KT88 amplifiers we have had good results using the new production JJ KT88 Blue Glass and Genalex - Gold Lion KT88 tubes.
DIY Single-Ended (SE) KT88 Tube Amplifier
The photos below are of Bernardo's DIY Single-Ended KT88 Tube Amplifier following Mikael Abdellah's schematic. Tube compliment in the photos is a Sovtek 6N1P in the driver position and a pair of matched Electro-Harmonix KT88EH in the output positions. See the SE KT88 Tube Amplifier thread by Bernardo for additional details about his build.
DIY Single-Ended KT88 Tube Amplifier
Rear View - DIY Single-Ended KT88 Tube Amplifier
Underside View - DIY Single-Ended KT88 Tube Amplifier
More Single-Ended KT88 and 6550 Tube Amplifiers
- SE KT88 / 6L6 / EL34 / 6CA7 Tube Amplifier Project with 6N1P driver - Alex Gendrano - (Project)
- SE KT88 Tube Amplifier Schematic with 12AX7 driver - Jean Hiraga
- SE 6550 Tube Amplifier Schematic with 12DW7 driver - (Photographs)