Vacuum Tube - EL34 II, JJ Electronics, Pentode
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Starting at: $25.50
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The JJ Electronic EL34 II is a different construction of the classic EL34 tube that offers a different tonal palette than the original. This tube has a more compact plate structure than standard EL34’s. The JJ EL34 II has an increased low to low-mid end with plenty of headroom to spare. This tube has a thick and tight bass response. The mids are balanced and harmonically rich with pleasantly smooth highs. The JJ EL34 II is stronger than the original but not harsh sounding in any way. When overdriven, this tube has a warm and dynamic distortion that rivals many vintage tubes.
Matched versions of this tube use Apex Matching
RoHS Compliant
Accessory Items:
| Single or Matched | Our Part Number | UPC/EAN |
|---|---|---|
| Single | T-EL34II-JJ | 841358101649 |
| Apex Matched Pair | T-EL34II-JJ-MP | 841358101663 |
| Apex Matched Quad | T-EL34II-JJ-MQ | 841358101670 |
| Body Height | 98 mm | ||
| Cathode Current (Ik) | ≤ 150 mA | ||
| Filament Current (If) | 1.5 A | ||
| Filament Voltage (Uf) | 6.3 V | ||
| Gain (μg2/g2) | 11 | ||
| Grid 2 Dissipation (wg2) | 8 W | ||
| Grid Capacitance (cg1) | 15.5 pF | ||
| Grid Current 2 (Ig2) | 14.9 mA | ||
| Grid Voltage 1 (Ug1) | -13.5 V typical | ||
| Grid Voltage 2 (Ug2) | ≤ 450 V, 265 V typical | ||
| Grid Voltage 3 (Ug3) | 0 V typical | ||
| Grid to Plate Capacitance (ca/g) | 1.3 pF | ||
| Heater to Cathode Voltage (Uk/f) | ≤ 100 V | ||
| Heater to cathode resistance (Rk/f) | 20 kΩ | ||
| Internal Resistance (Ri) | 15 kΩ | ||
| Item Diameter | 33.3 mm | ||
| Item Height | 112 mm | ||
| Plate Capacitance (ca) | 10 pF | ||
| Plate Current (Ia) | 100 mA | ||
| Plate Dissipation (Wa) | ≤ 25 W | ||
| Plate Voltage (Ua) | ≤ 800 V, 250 V typical | ||
| Transconductance (S) | 11 mA/V | ||
| Packaging Dimensions | Apex Matched Pair version | T-EL34II-JJ-MP | 4.6 in. × 3.21 in. × 1.65 in. |
| Apex Matched Quad version | T-EL34II-JJ-MQ | 4.6 in. × 3.2 in. × 3.21 in. | |
| Single version | T-EL34II-JJ | 1.59 in. × 1.59 in. × 4.61 in. | |
| Weight (Packaging) | Apex Matched Pair version | T-EL34II-JJ-MP | 0.2514 lbs. |
| Apex Matched Quad version | T-EL34II-JJ-MQ | 0.5028 lbs. | |
| Single version | T-EL34II-JJ | 0.1257 lbs. |
| T-EL34II-JJ-MP - Apex Matched Pair version | Body Height | 98 mm |
| Cathode Current (Ik) | ≤ 150 mA | |
| Filament Current (If) | 1.5 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Gain (μg2/g2) | 11 | |
| Grid 2 Dissipation (wg2) | 8 W | |
| Grid Capacitance (cg1) | 15.5 pF | |
| Grid Current 2 (Ig2) | 14.9 mA | |
| Grid Voltage 1 (Ug1) | -13.5 V typical | |
| Grid Voltage 2 (Ug2) | ≤ 450 V, 265 V typical | |
| Grid Voltage 3 (Ug3) | 0 V typical | |
| Grid to Plate Capacitance (ca/g) | 1.3 pF | |
| Heater to Cathode Voltage (Uk/f) | ≤ 100 V | |
| Heater to cathode resistance (Rk/f) | 20 kΩ | |
| Internal Resistance (Ri) | 15 kΩ | |
| Item Diameter | 33.3 mm | |
| Item Height | 112 mm | |
| Plate Capacitance (ca) | 10 pF | |
| Plate Current (Ia) | 100 mA | |
| Plate Dissipation (Wa) | ≤ 25 W | |
| Plate Voltage (Ua) | ≤ 800 V, 250 V typical | |
| Transconductance (S) | 11 mA/V | |
| T-EL34II-JJ-MQ - Apex Matched Quad version | Body Height | 98 mm |
| Cathode Current (Ik) | ≤ 150 mA | |
| Filament Current (If) | 1.5 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Gain (μg2/g2) | 11 | |
| Grid 2 Dissipation (wg2) | 8 W | |
| Grid Capacitance (cg1) | 15.5 pF | |
| Grid Current 2 (Ig2) | 14.9 mA | |
| Grid Voltage 1 (Ug1) | -13.5 V typical | |
| Grid Voltage 2 (Ug2) | ≤ 450 V, 265 V typical | |
| Grid Voltage 3 (Ug3) | 0 V typical | |
| Grid to Plate Capacitance (ca/g) | 1.3 pF | |
| Heater to Cathode Voltage (Uk/f) | ≤ 100 V | |
| Heater to cathode resistance (Rk/f) | 20 kΩ | |
| Internal Resistance (Ri) | 15 kΩ | |
| Item Diameter | 33.3 mm | |
| Item Height | 112 mm | |
| Plate Capacitance (ca) | 10 pF | |
| Plate Current (Ia) | 100 mA | |
| Plate Dissipation (Wa) | ≤ 25 W | |
| Plate Voltage (Ua) | ≤ 800 V, 250 V typical | |
| Transconductance (S) | 11 mA/V | |
| T-EL34II-JJ - Single version | Body Height | 98 mm |
| Cathode Current (Ik) | ≤ 150 mA | |
| Filament Current (If) | 1.5 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Gain (μg2/g2) | 11 | |
| Grid 2 Dissipation (wg2) | 8 W | |
| Grid Capacitance (cg1) | 15.5 pF | |
| Grid Current 2 (Ig2) | 14.9 mA | |
| Grid Voltage 1 (Ug1) | -13.5 V typical | |
| Grid Voltage 2 (Ug2) | ≤ 450 V, 265 V typical | |
| Grid Voltage 3 (Ug3) | 0 V typical | |
| Grid to Plate Capacitance (ca/g) | 1.3 pF | |
| Heater to Cathode Voltage (Uk/f) | ≤ 100 V | |
| Heater to cathode resistance (Rk/f) | 20 kΩ | |
| Internal Resistance (Ri) | 15 kΩ | |
| Item Diameter | 33.3 mm | |
| Item Height | 112 mm | |
| Plate Capacitance (ca) | 10 pF | |
| Plate Current (Ia) | 100 mA | |
| Plate Dissipation (Wa) | ≤ 25 W | |
| Plate Voltage (Ua) | ≤ 800 V, 250 V typical | |
| Transconductance (S) | 11 mA/V |
 Specification Sheet | All Models |
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Product Reviews
Garbage. Tried them in my Carr hand-wired amp. Even when played clean, the EQ is notched. When overdriven, they sound even worse, more notched and nasal. There are so many better choices out there.
Precisely matched tube set is a breeze to bias!
Recently retubed a Marshall 100 watt plexi. The old Svetlana EL34s were replaced w JJEL34ii power tubes. Balanced and biased a bit hotter than factory....the results are excellent, rich tone with deep tight bothom end and much smoother mids and highs. I am quite pleased