Description
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.
Theyoffer more than 35 preamp, power and rectifier tubes. All tubes were developed by their in-house research and engineering teams. In addition, they manufacture electrolytic capacitors for different voltages, both radial and axial types. Today, their manufacturing program also includes a number of high-end audio and guitar tube amplifiers. All of their products are the result of diligent research in the audio field and its continual application into manufacturing.
JJElectronic is proud of the fact that every component used in their vacuum tube production is manufactured in-house. This enables them 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 processes.
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.
Features
- Perfect for combo amps as well as HiFi equipment
- Deliversbeautiful clean tones, withsolid lows with warm bright mids and twinkling highs
- Perform well in amps that run higher plate voltage
Specs
| Body Height | 71.4 mm |
| Cathode Current (Ik) | 65 mA |
| Filament Current (If) | 0.76 A |
| Filament Voltage (Uf) | 6.3 V |
| Gain () | 19 |
| Grid 1 to filament capacitance (cg1f) | 0.15 pF |
| Grid Circuit Resistance 1 (Rg1), Automatic Bias | 1 M |
| Grid Circuit Resistance 1 (Rg1), Fixed Bias | 0.3 M |
| Grid Voltage 1 (Ug1) | -100 V, -7.3 V typical |
| Grid Voltage 2 (Ug2) | 300 V, 250 V typical |
| Grid to Cathode Capacitance (cg/k) | 10 pF |
| Grid to Plate Capacitance (ca/g) | 0.6 pF |
| Heater to cathode voltage (Uk/f) | 100 V |
| Internal Resistance (Ri) | 40 k |
| Item Diameter | 22 mm |
| Item Height | 77.8 mm |
| Plate Capacitance (ca) | 5.1 pF |
| Plate Current (Ia) | 48 mA |
| Plate Dissipation (Wa) | 12 W |
| Plate Voltage (Ua) | 300 V, 250 V typical |
| Transconductance (S) | 11.3 mA/V |
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