JJ Electronic 300B Power Tubes Matched Pair

JJ Electronic 300B Power Tubes Matched Pair

A.F. TRIODE - 300B is a power triode with a directly heated cathode and power of 40 W, mostly for Hi-Fi application. Detailed and clear sound provides real musical reproduction.

JJ Electronic is a world-renowned manufacturer of vacuum tubes, electrolytic capacitors and high-end audio amplifiers. Founded in 1993 by Jan Jurco, a small garage business grew to become a well known and respected in music industry.

JJ vacuum tubes and capacitors are widely used in guitar and audio amplifiers, recording studio equipment and in a variety of applications for audiophiles.
 
JJ Electronic offer more than 35 preamp, power and rectifier tubes. All tubes were developed by JJ Electronic's in-house research and engineering teams. In addition, JJ Electronic manufacture electrolytic capacitors for different voltages, both radial and axial types. Today, JJ Electronic's manufacturing program also includes a number of high-end audio and guitar tube amplifiers. All of JJ Electronic's products are the result of diligent research in the audio field and its continual application into manufacturing.

JJ Electronic are proud of the fact that every component used in JJ Electronic's vacuum tube production is manufactured in-house. This enables us to have complete quality control of every part of the manufacturing process. All materials used in tube and capacitor production undergo a meticulous cleaning process such as ultrasonic cleaning, annealing in protective atmosphere and reactive rinsing. The assembly process is carried out by a combination of meticulous manual operations and state-of-the-art production procesess.

All vacuum tubes and capacitors go through an extended burn-in period to ensure superior stability. A rigorous final test for tubes and capacitors verifies every important parameter. In particular, the parameters for flawless tube functioning include insulation characteristics, vacuum level, cathode emission efficiency, filament voltage, plate currents, and microphonics. The quality control process includes several thousand hours of reliability testing on samples of tubes and capacitors.

By using JJ Electronic's tubes and capacitors in JJ Electronic's own line of audio amplifiers, JJ Electronic continually verify their quality and preformance in the practical applications.