Vacuum Tube - EL84, JJ Electronics
The JJ Electronic EL84 is a solidly built EL84 / 6BQ5 with excellent tonal qualities. JJ’s rugged construction of this tube offers high reliability without any compromise to the sound. This tube has solid lows with warm bright mids and shimmery highs. When saturated the harmonics are rich and dynamic. The JJ EL84 nails the classic sound of this tube. This tube can replace any EL84 or 6BQ5 tube.
Matched versions of this tube use Apex Matching
Choose burned-in tubes for maximum stability and performance.
RoHS Compliant
Accessory Items:
| Single or Matched | Our Part Number | UPC/EAN | JJ Electronics Part Number |
|---|---|---|---|
| Apex Matched Pair | T-EL84-JJ-MP | 609722123105 | |
| Apex Matched Quad | T-EL84-JJ-MQ | 609722123112 | |
| Apex Burned-In Matched Pair | T-EL84-JJ-MPB | 841358108914 | |
| Apex Burned-In Matched Quad | T-EL84-JJ-MQB | 841358108921 | |
| Single | T-EL84-JJ | 609722123099 | EL84 - 6BQ5 |
| Body Height | 71.4 mm | ||
| Cathode Current (Ik) | ≤ 65 mA | ||
| Filament Current (If) | 0.76 A | ||
| Filament Voltage (Uf) | 6.3 V | ||
| Gain (μ) | 19 | ||
| Grid 1 to filament capacitance (cg1f) | 0.15 pF | ||
| Grid Circuit Resistance 1 (Rg1), Automatic Bias | 1 MΩ | ||
| Grid Circuit Resistance 1 (Rg1), Fixed Bias | 0.3 MΩ | ||
| 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 kΩ | ||
| 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 | ||
| Packaging Dimensions | Apex Burned-In Matched Pair version | T-EL84-JJ-MPB | 1 in. × 2.1 in. × 3.8 in. |
| Apex Burned-In Matched Quad version | T-EL84-JJ-MQB | 2.1 in. × 2.1 in. × 3.8 in. | |
| Apex Matched Pair version | T-EL84-JJ-MP | 1 in. × 2.1 in. × 3.8 in. | |
| Apex Matched Quad version | T-EL84-JJ-MQ | 2.1 in. × 2.1 in. × 3.8 in. | |
| Single version | T-EL84-JJ | 1 in. × 1 in. × 3.6 in. | |
| Weight (Packaging) | Apex Burned-In Matched Pair version | T-EL84-JJ-MPB | 0.0794 lbs. |
| Apex Burned-In Matched Quad version | T-EL84-JJ-MQB | 0.1588 lbs. | |
| Apex Matched Pair version | T-EL84-JJ-MP | 0.0794 lbs. | |
| Apex Matched Quad version | T-EL84-JJ-MQ | 0.1588 lbs. | |
| Single version | T-EL84-JJ | 0.0397 lbs. |
| T-EL84-JJ-MP - Apex Matched Pair version | Body Height | 71.4 mm |
| Cathode Current (Ik) | ≤ 65 mA | |
| Filament Current (If) | 0.76 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Gain (μ) | 19 | |
| Grid 1 to filament capacitance (cg1f) | 0.15 pF | |
| Grid Circuit Resistance 1 (Rg1), Automatic Bias | 1 MΩ | |
| Grid Circuit Resistance 1 (Rg1), Fixed Bias | 0.3 MΩ | |
| 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 kΩ | |
| 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 | |
| T-EL84-JJ-MQ - Apex Matched Quad version | Body Height | 71.4 mm |
| Cathode Current (Ik) | ≤ 65 mA | |
| Filament Current (If) | 0.76 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Gain (μ) | 19 | |
| Grid 1 to filament capacitance (cg1f) | 0.15 pF | |
| Grid Circuit Resistance 1 (Rg1), Automatic Bias | 1 MΩ | |
| Grid Circuit Resistance 1 (Rg1), Fixed Bias | 0.3 MΩ | |
| 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 kΩ | |
| 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 | |
| T-EL84-JJ-MPB - Apex Burned-In Matched Pair version | Body Height | 71.4 mm |
| Cathode Current (Ik) | ≤ 65 mA | |
| Filament Current (If) | 0.76 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Gain (μ) | 19 | |
| Grid 1 to filament capacitance (cg1f) | 0.15 pF | |
| Grid Circuit Resistance 1 (Rg1), Automatic Bias | 1 MΩ | |
| Grid Circuit Resistance 1 (Rg1), Fixed Bias | 0.3 MΩ | |
| 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 kΩ | |
| 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 | |
| T-EL84-JJ-MQB - Apex Burned-In Matched Quad version | Body Height | 71.4 mm |
| Cathode Current (Ik) | ≤ 65 mA | |
| Filament Current (If) | 0.76 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Gain (μ) | 19 | |
| Grid 1 to filament capacitance (cg1f) | 0.15 pF | |
| Grid Circuit Resistance 1 (Rg1), Automatic Bias | 1 MΩ | |
| Grid Circuit Resistance 1 (Rg1), Fixed Bias | 0.3 MΩ | |
| 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 kΩ | |
| 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 | |
| T-EL84-JJ - Single version | Body Height | 71.4 mm |
| Cathode Current (Ik) | ≤ 65 mA | |
| Filament Current (If) | 0.76 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Gain (μ) | 19 | |
| Grid 1 to filament capacitance (cg1f) | 0.15 pF | |
| Grid Circuit Resistance 1 (Rg1), Automatic Bias | 1 MΩ | |
| Grid Circuit Resistance 1 (Rg1), Fixed Bias | 0.3 MΩ | |
| 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 kΩ | |
| 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 |
 Specification Sheet | All Models |
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Specifications, Files, and Documents
Questions? Contact us at [email protected], or give us a call at 480-820-5411
Substitute Products
The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.
Product Reviews
I designed the JJ-EL84 (class A configuration) into my stereo and the sound is amazing. A dependable tube with crisp highs and beautiful lows.
A fine tube for a reasonable price.
Beautiful sounding tubes. Using two of these in a parallel SE amp I built, and they sound great, like all other JJ tubes I've used so far. I much prefer these over so called NOS tubes, a much better value!
I like them. They seem to breathe new life into an old Blues Jr.
I installed these in my push-pull guitar amp and monitored the cathode current as I adjusted the quiescent bias current. These two tube were perfectly balanced and tracked each other as I made adjustments. APEX Matching seems to work as advertised. They sound great too.
I got a matched pair of these tubes and they actually sound better to me than some more expensive brands. The glass envelope seems a bit thicker, too. It seems to help with heat dissipation which can be an issue with this tube. With my Fluke infrared tester, the previous tubes (a different brand) measured near 200 C which is about the limit for this tube. The JJ tube measures around 160 to 175 C. I will buy these again.
excellent recommanded
The Tubes arrived quickly and safe. The amp now sound great!
Awesome tubes, perfectly matched and great low end.
I can't say much more about JJ than their performance reliability can. You may be able to spend more money for a different tone, but if you want to invest in predictable tone go JJ/Tesla!
They are inexpensive, realiable, and more importantly, you can find them on the road. A tube swap during the tour will yield the same sound you've already achieved using JJ with a new set of tubes from JJ.