Vacuum Tube - EL84, JJ Electronics

Vacuum Tube - EL84, JJ Electronics

JJ Electronics
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Starting at: $16.15
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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.

Apex Tube Matching
Matched versions of this tube use Apex Matching
Choose burned-in tubes for maximum stability and performance.
SKU:
T-EL84-JJ
Item ID:
004855
Brand:
JJ Electronics, Apex Matched
RoHS Compliant
Part Numbers
Single or MatchedOur Part NumberUPC/EANJJ Electronics Part Number
Apex Matched PairT-EL84-JJ-MP609722123105
Apex Matched QuadT-EL84-JJ-MQ609722123112
Apex Burned-In Matched PairT-EL84-JJ-MPB841358108914
Apex Burned-In Matched QuadT-EL84-JJ-MQB841358108921
SingleT-EL84-JJ609722123099 EL84 - 6BQ5
Product Measurements by Type
Body Height71.4 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 Bias1 MΩ
Grid Circuit Resistance 1 (Rg1), Fixed Bias0.3 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 Diameter22 mm
Item Height77.8 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 Information
Packaging DimensionsApex Burned-In Matched Pair versionT-EL84-JJ-MPB1 in. × 2.1 in. × 3.8 in.
Apex Burned-In Matched Quad versionT-EL84-JJ-MQB2.1 in. × 2.1 in. × 3.8 in.
Apex Matched Pair versionT-EL84-JJ-MP1 in. × 2.1 in. × 3.8 in.
Apex Matched Quad versionT-EL84-JJ-MQ2.1 in. × 2.1 in. × 3.8 in.
Single versionT-EL84-JJ1 in. × 1 in. × 3.6 in.
Weight (Packaging)Apex Burned-In Matched Pair versionT-EL84-JJ-MPB0.08 lbs.
Apex Burned-In Matched Quad versionT-EL84-JJ-MQB0.16 lbs.
Apex Matched Pair versionT-EL84-JJ-MP0.08 lbs.
Apex Matched Quad versionT-EL84-JJ-MQ0.16 lbs.
Single versionT-EL84-JJ0.04 lbs.
Product Measurements by Item
T-EL84-JJ-MP - Apex Matched Pair versionBody Height71.4 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 Bias1 MΩ
Grid Circuit Resistance 1 (Rg1), Fixed Bias0.3 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 Diameter22 mm
Item Height77.8 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 versionBody Height71.4 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 Bias1 MΩ
Grid Circuit Resistance 1 (Rg1), Fixed Bias0.3 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 Diameter22 mm
Item Height77.8 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 versionBody Height71.4 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 Bias1 MΩ
Grid Circuit Resistance 1 (Rg1), Fixed Bias0.3 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 Diameter22 mm
Item Height77.8 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 versionBody Height71.4 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 Bias1 MΩ
Grid Circuit Resistance 1 (Rg1), Fixed Bias0.3 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 Diameter22 mm
Item Height77.8 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 versionBody Height71.4 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 Bias1 MΩ
Grid Circuit Resistance 1 (Rg1), Fixed Bias0.3 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 Diameter22 mm
Item Height77.8 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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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet287.02 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on October 14th, 2016.
Matt H.
October 14th, 2016
Staff Member
A blue glow on the surface of the glass, mica, or metal is fine. A blue or violet cloud within the tube structure is bad. An orange glow from the filament or cathode in the middle of the tube is normal and can vary from very bright to very dim depending on how it is covered from view by the surrounding structures. A red or orange glow on the surface of the plate is bad and is referred to as "red-plating." This is caused by setting the bias of the tube too hot. If the tube was bad you would hear it.
Asked by Anonymous on May 24th, 2017.
Matt H.
May 24th, 2017
Staff Member
If you want to use EL84's with your amp you will need to purchase the "YJS" or "YJShort" Yellow Jackets. These are pin converters that allow you to safely use EL84's in your amp.
Asked by Anonymous on May 31st, 2018.
Matt H.
May 31st, 2018
Staff Member
The Blues Junior comes stock with a pair of EL84's and these would be an excellent choice for your amp.
Asked by Anonymous on July 27th, 2018.
CurtisG
July 27th, 2018
These are not burned in. Unfortunately, we do not offer a burned in version of these tubes at this time.
Asked by Anonymous on August 28th, 2018.
BradWbr
August 28th, 2018
Staff Member
Yes, the 6BQ5 is the American name for these tubes. As they were commonly used in European amps, the European name EL84 has become the more commonly used term.
Asked by Anonymous on November 8th, 2018.
BradWbr
November 9th, 2018
Staff Member
For more information on the Apex Burn In process, please visit the Apex tube matching website: https://www.apexmatching.com/apex-burn

Product Reviews

4.97 out of 5 based on 36 reviews
- May 13th, 2022
5 out of 5

Very good sound quality and freq range. Somewhat shorter life and runs hot in our blues Jr and Ampeg Jet amps.

- April 16th, 2022
5 out of 5

Fast service from this company on hard to find vacuum tubes! Still looking for 12ax7's!

- April 14th, 2022
5 out of 5

Perfect product! I love that these were Apex matched and that I could find tubes. I popped one and was able to find this pair. I replace both if I drop only one - - keep them matched.
The service was fantastic, shipping was quick and secure. Great place to order tubes or any other guitar needs

- April 14th, 2022
5 out of 5

I purchased a set of JJ el84s, great price and fast delivery. I’m very happy with how securely the tubes were packaged and will absolutely continue to purchase vacuum tubes from here again

- February 9th, 2022
5 out of 5

Great Service and fast shipping!

- January 26th, 2022
5 out of 5

A complete re-tube using JJ EL84's and 12AX7's in my Stage Right by Monoprice 15 watt amp completely restored the amp's volume and greatly improved the tone.

- January 21st, 2022
5 out of 5

A friend recommended JJ tubes for my Bugera T5. I couldn't be happier. A bright sound with just enough gain.

- November 13th, 2021
4 out of 5

Good solid tube that will certainly get the job done. I find they cant take the heat over time. If you really want to bring a CL30 to life and not worry about replacing every 3-4 months, go with the EH version.

- September 29th, 2021
5 out of 5

JJ tubes are by far the best value on the market and they have been for some time now as far as I am concerned...and with the additional expertise of antique electronics and there Apex matching process you will be hard pressed to find anything better...just give them a try

- July 26th, 2021
5 out of 5

They are really matched. I set bias for individual tubes and made them run at the same current. After couple days burned in, I rechecked, currents of each tube are still in sync, although the current increased a little bit due to burning in process. PS: the tubes were fixed biased

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.