• Item: Tube Amplifier  
  • Type: EL84 Single ended Triode  
  • Posted: 24 November 2018  
  • Builder: tube_nut  
  • Country: Hong Kong  
  • Comments: 2  


This is a simple 2-stage EL84 SE triode amp using cathode bias. The driver is a ECC85 tube. The circuit was designed by a famous Japanese amp designer.

The power & output transformers are Hashimoto. The power supply made use of a CRC design with Black Gate WKZ as first stage & Jensen 4-pole as second stage.

The resistors were mostly 1W Takman metal film or 2W TKD.

I added a selector switch to choose among no feedback vs feedback with either Takman or Shinkoh resistors.

There is only around 2W output. But it is more than enough for my Voxativ drivers.


  • Ujjal
  • 24 November 2018 at 11:03PM
  • Beautiful craftsmanship

    Where can I get the gold VU meter you used?
  • tube_nut
  • 24 November 2018 at 11:39PM
  • Thank you!

    For the meter, I bought it here:


    It is also available here:


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