JJ Electronic

In technical terms, JJ produces triodes, beam tetrodes and power pentodes.

Double diode vacuum tubes for full-wave AC-to-DC rectifiers are also produced.

JJ also produces electrolytic capacitors for higher-voltage purposes, generally for use in audio amplifiers.

JJ Electronic was founded in 1993 by Jan Jurco, using the old Tesla machinery for the manufacture of vacuum tubes.

Eventually, JJ Electronic started to produce its own line of vacuum tubes and electrolytic capacitors, mainly targeted at high-end audiophile and guitar amplifier applications.