Vacuum Tube - EL84, JJ Electronics

JJ Electronics
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Vacuum Tube - EL84, JJ Electronics

Starting at: $11.05
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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.
RoHS Compliant
SKU:
T-EL84-JJ
Item ID:
004855
Brand:
JJ Electronics, Apex Matched
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
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
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
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
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 January 29th, 2018.
Matt H
February 2nd, 2018
Towards the end of the checkout process there will be a notes section where you will want to state, "please match as middle numbers." This range is compatible with all Mesa amps.
Asked by Anonymous on March 13th, 2018.
Matt H
March 13th, 2018
The Epiphone valve Jr calls for one EL84 and one 12AX7. In fact, we carry a tube set for your amp. Do a search for SET-EPIPHONE-002.
Asked by Anonymous on May 31st, 2018.
Matt H
May 31st, 2018
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 August 26th, 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 delvisdiaz on June 25th, 2020.
BradWbr
June 25th, 2020
Staff Member
That amp appears to use power tubes with an octal base, so no, this is not compatible with that amp without an adapter.
Asked by Anonymous on October 14th, 2016.
No answers yet!

Product Reviews

4.80 out of 5 based on 10 reviews
- September 13th, 2020
5 out of 5

I put this in my 50 year old Harmony 410A amplifier. This was a drop in replacement for the tube that was originally in the amp. Now my first amplifier from childhood that ended back in my hands after many many years is functioning perfectly.

- September 2nd, 2020
5 out of 5

Really happy with the service from Amplified Parts. This was my first order with them, and I got an order confirmation very quickly, and their site was very good at providing updates. My tubes were shipped the same day I ordered them and they arrived faster than I expected. Thanks!

I was previously running Groove Tube EL84's in my amp but see the JJ's highly recommended across various guitar forums I visit. I had a preamp tube go bad and just decided to replace the whole set of EL84's and 12AX7's in my amp to try something different. I really didn't expect much of a difference, but boy was I surprised. After I plugged these in, my tone was night and day difference over the groove tubes. My amp has never sounded so good, and I didn't want to stop playing. It sounded much more alive, bright, and with a better mid-range punch. I chose the gold pin version of the 12AX7's, but I'm not sure how much of a difference the gold makes, as I have not compared them to the standard tubes. Bottom line, you won't be disappointed with either JJ tubes or the service from Amplified Parts.

- July 23rd, 2020
3 out of 5

I have a couple home made EL84 amps, one cathode biased with a preamp similar to a Marshall Bluesbreaker, and one fixed bias with a hot-rodded marshall style high gain preamp. I had a pair of NOS Sylvania tubes that I used in the high gain amp, but these ended up burning out. I put a matched pair of JJ's in to replace them and am admittedly disappointed. I knew they wouldn't sound as good than the NOS ones, but they were comparatively worse. In both amps, they have a fuzzier, harsher distortion sound that I'm not particularly fond of. I don't want to give less than 3 because my only prior experience with EL84s were NOS tubes, which are certainly going to be better.

- April 7th, 2020
5 out of 5

I got a matched pair for my Orange OR-15 and it sounds great. Next year I may spend more and try something more expensive but I will know the JJ’s do the job for an exceptional price.

- December 4th, 2019
5 out of 5

Put these in a fender pro junior 111. Great tubes, decent headroom and great when driven

- September 19th, 2018
5 out of 5

Good tube at a fair price, and the Apex matching can be a real plus. Work well in guitar amps, more reliable than most and response seems balanced.

- May 29th, 2014
5 out of 5

I discovered JJ tubes about a year ago after obtaining some new amps and starting a business of repairing them. I find these to be great sounding and recommend them to customers as a low cost option to re tubing with NOS or other more expensive brands. I can attest by doing several sounds tests that JJs, especially these EL84s, sound great, provide a wide range of tone, and do well at bringing dead amps back to life. I've tried GTs, EHs, and Sovteks as singles and in matched kits and I can say that JJs usually out perform the other kinds hands down. Great product!

- October 19th, 2011
5 out of 5

A great EL84 tube and less than half the price of some of the Russian and Chinese EL84-like tubes. Based on my experience with different amps from Scott and VOX to new Fenders this is the only authentic performing EL84 being made. The Russian "EL84" tubes are all based on an old Russian millitary type which is similar to an EL84 but not quite the same thing and its noticeable. The Chinese versions all seem to be copies of the Russian Types. I cant recommend this tube highly enough if you cant afford the exorbitant high price of NOS tubes.These are made just like an old Amperex or Valvo anyway.

- September 2nd, 2010
5 out of 5

Just put 4 EL84's and 6 12AX7's in my Mesa DC-3 and this amp sounds better than ever! Very impressed!

- August 26th, 2010
5 out of 5

I replaced all the tubes in my Mesa Boogie Duel Rectifier with these tubes and they sound terrific. Still have that Mesa clean sound and can easily kick into dirty biting Mesa distortion it is famous for. Not bad, given I paid less than half of the price of fancy tubes.

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.