by Mauri Pännäri October 5 Audiophilia Enthusiasm Revenge EL/PL36 SE Amp Revenge TV sweep tube SE amplifier was designed to revive the lost chords of music. by Mauri Pännäri May 21 Audiophilia Vintage The Swiss UNITON UNITON EV-ST71 is a rare 50W power amp with a particularly interesting background. by Mauri Pännäri July 28 Audiophilia Enthusiasm The legendary Lohstroh-Otala Amplifier revisited Amplifier freaks may know The 2 Channel Audio amplifier, and even its forerunner The Lohstroh-Otala amplifier. Less well-known is that the latter gave rise to DIY-following soon after its introduction. by Mauri Pännäri September 22 Audiophilia Technology Revenge 6BX7 PP amplifier A clever tube amp in the footsteps of Mr Köykkä.