Putket

Ultra-low noise thanks to unique spiral filament which eliminates cathode-to-filament induced hum on certain amps Best all-around choice and best value for 12AX7 ECC83/7025 equivalent Many other suppliers use relabeled Electro Harmonix vacuum tubes in their amplifiers

Rugged and wonderful-sounding Power Beam tetrode that performs flawlessly at up to 475 volts. Specially developed cathode coating Tri-alloy plate material Carefully aligned grid Carefully aligned grid