Stealth – fully balanced headphone/ line tube amplifier
My friend, who is running the Tube Sound Labs small enterprise, accomplished one of his latest toy-projects: a fully balanced tube driven headphone/line amplifier.
The ”Stealth” head-amp is build on a small than usual box, having the JJ made E88CC vacuum tubes and the supply transformer at display.
The topology, refined for almost three years , consists in a mu-follower build with E88CC.
The power supply uses s over-sized toroidal transformer, a fully regulated anodic voltage, as well as super-regulated slow-turn on DC filament supply.
The output is via a Sowter transformer. Also, the balanced input is fed via a balanced Sowter transformer.
‘Stealth’ could be used as headphone amp, as his output impedance is 600 Ohm, as well as volume controlled mini-preamplifier (without remote).
The front panel sports just the volume control knob and a power supply red LED, while the back plate hosts the AC IEC socket plus the balanced IN & OUT sockets.
© attitube.com/2013