12AU7HJ Preamp tubes (ECC82) offers a well-balanced, colorful and robust tone.
Our 12AU7HJ tubes uses Carbon Microcrystalline technology which has:
Excellent heat transfer performance
Stabilization of the electrical performance inside of the Vacuum tube
Very low electric inductivity
Very low dielectric loss
High breakdown voltage
High electric volume resistivity
High arc resistance
Withstand high temperature, low temperature resistance and Anti-corrosion.
Enhanced stabilization and durability of the vacuum tube.
Experience the true tone as it’s meant to be from Harry Joyce USA
Sold in Pairs
Filament heating
UH —————– 6.3 (and) 12.6 (string) V
IH ——————- 0.30 0.15 A
Electrode capacitance
No.1 No.2
Input capacitance ———- 1.6 1.6 PF
———- 0.4 0.32 PF output capacitor
Cross-Road capacitance ———- 1.5 1.5 PF
Static parameters
Ua ————– 100 250 V
-Ug ————- 0 8.5 V
Ia ————— 11.8 10.5 mA
Gm ————– 3.1 2.2 mA / V
u ————— 20 17
ri (approx) ——— 6.5 7.7 KΩ
Ug (approx) ——— 11.8 -10.5 V
(When Ia = 10uA)
A1 amplify limits (single transistor)
Anode voltage —————- 300 V
Anode dissipation power ————- 2.75 W
The largest cathode current ————- 20 mA
Gate voltage —————– 50 V
Filament cathode voltage (pk) ——– ± 200 V
Gate resistance
Since bias —————- 1 MΩ
Fixed voltage ————– 0.25 MΩ
