Tube 5687A output headphone amplifier stereo with delay circuit bare PCB !

This is a bare PCB of a tube amplifier. Each channel makes use of a single low noise tube 12AU7 at the input and proceeded by a famous driver tube 5687A as a cathode follower to accomplish headphone power amplification. The board also integrates delay circuit so when power is on there is no noise created to impact the headphone.

Each board consists of two channel thus one board can be used for stereo application.

The schematic is shown below for reference. We provide detailed schematic ( with values and rating) to buyers by EMAIL.