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Vacuum Tube - EL84, JJ Electronics

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SKU:	T-EL84-JJ
Item ID:	004855

Starting at: $11^.05

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Type

Power Burned In

Vacuum Tubes Apex Matched

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.

Part Numbers
Single or Matched	Our Part Number	UPC/EAN
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

RoHS Compliant

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Specifications, Files, and Documents

Specification Sheet

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Product Measurements by Type (click to expand)

Product Measurements by Type
Body Height		71.4 mm
Cathode Current (I_k)		≤ 65 mA
Filament Current (I_f)		0.76 A
Filament Voltage (U_f)		6.3 V
Gain (μ)		19
Grid 1 to filament capacitance (c_g1f)		0.15 pF
Grid Circuit Resistance 1 (R_g1), Automatic Bias		1 MΩ
Grid Circuit Resistance 1 (R_g1), Fixed Bias		0.3 MΩ
Grid Voltage 1 (U_g1)		≥ -100 V, -7.3 V typical
Grid Voltage 2 (U_g2)		≤ 300 V, 250 V typical
Grid to Cathode Capacitance (c_g/k)		10 pF
Grid to Plate Capacitance (c_a/g)		0.6 pF
Heater to cathode voltage (U_k/f)		≤ 100 V
Internal Resistance (R_i)		40 kΩ
Item Diameter		22 mm
Item Height		77.8 mm
Plate Capacitance (c_a)		5.1 pF
Plate Current (I_a)		48 mA
Plate Dissipation (W_a)		≤ 12 W
Plate Voltage (U_a)		≤ 300 V, 250 V typical
Transconductance (S)		11.3 mA/V

Packaging Information
Packaging Dimensions	Apex Burned-In Matched Pair version	1 in. × 2.1 in. × 3.8 in.
	Apex Burned-In Matched Quad version	2.1 in. × 2.1 in. × 3.8 in.
	Apex Matched Pair version	1 in. × 2.1 in. × 3.8 in.
	Apex Matched Quad version	2.1 in. × 2.1 in. × 3.8 in.
	Single version	1 in. × 1 in. × 3.6 in.
Weight (Packaging)	Apex Burned-In Matched Pair version	0.08 lbs.
	Apex Burned-In Matched Quad version	0.16 lbs.
	Apex Matched Pair version	0.08 lbs.
	Apex Matched Quad version	0.16 lbs.
	Single version	0.04 lbs.

Product Measurements by Item (click to expand)

Product Measurements by Item
T-EL84-JJ-MP - Apex Matched Pair version	Body Height	71.4 mm
	Cathode Current (I_k)	≤ 65 mA
	Filament Current (I_f)	0.76 A
	Filament Voltage (U_f)	6.3 V
	Gain (μ)	19
	Grid 1 to filament capacitance (c_g1f)	0.15 pF
	Grid Circuit Resistance 1 (R_g1), Automatic Bias	1 MΩ
	Grid Circuit Resistance 1 (R_g1), Fixed Bias	0.3 MΩ
	Grid Voltage 1 (U_g1)	≥ -100 V, -7.3 V typical
	Grid Voltage 2 (U_g2)	≤ 300 V, 250 V typical
	Grid to Cathode Capacitance (c_g/k)	10 pF
	Grid to Plate Capacitance (c_a/g)	0.6 pF
	Heater to cathode voltage (U_k/f)	≤ 100 V
	Internal Resistance (R_i)	40 kΩ
	Item Diameter	22 mm
	Item Height	77.8 mm
	Plate Capacitance (c_a)	5.1 pF
	Plate Current (I_a)	48 mA
	Plate Dissipation (W_a)	≤ 12 W
	Plate Voltage (U_a)	≤ 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 (I_k)	≤ 65 mA
	Filament Current (I_f)	0.76 A
	Filament Voltage (U_f)	6.3 V
	Gain (μ)	19
	Grid 1 to filament capacitance (c_g1f)	0.15 pF
	Grid Circuit Resistance 1 (R_g1), Automatic Bias	1 MΩ
	Grid Circuit Resistance 1 (R_g1), Fixed Bias	0.3 MΩ
	Grid Voltage 1 (U_g1)	≥ -100 V, -7.3 V typical
	Grid Voltage 2 (U_g2)	≤ 300 V, 250 V typical
	Grid to Cathode Capacitance (c_g/k)	10 pF
	Grid to Plate Capacitance (c_a/g)	0.6 pF
	Heater to cathode voltage (U_k/f)	≤ 100 V
	Internal Resistance (R_i)	40 kΩ
	Item Diameter	22 mm
	Item Height	77.8 mm
	Plate Capacitance (c_a)	5.1 pF
	Plate Current (I_a)	48 mA
	Plate Dissipation (W_a)	≤ 12 W
	Plate Voltage (U_a)	≤ 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 (I_k)	≤ 65 mA
	Filament Current (I_f)	0.76 A
	Filament Voltage (U_f)	6.3 V
	Gain (μ)	19
	Grid 1 to filament capacitance (c_g1f)	0.15 pF
	Grid Circuit Resistance 1 (R_g1), Automatic Bias	1 MΩ
	Grid Circuit Resistance 1 (R_g1), Fixed Bias	0.3 MΩ
	Grid Voltage 1 (U_g1)	≥ -100 V, -7.3 V typical
	Grid Voltage 2 (U_g2)	≤ 300 V, 250 V typical
	Grid to Cathode Capacitance (c_g/k)	10 pF
	Grid to Plate Capacitance (c_a/g)	0.6 pF
	Heater to cathode voltage (U_k/f)	≤ 100 V
	Internal Resistance (R_i)	40 kΩ
	Item Diameter	22 mm
	Item Height	77.8 mm
	Plate Capacitance (c_a)	5.1 pF
	Plate Current (I_a)	48 mA
	Plate Dissipation (W_a)	≤ 12 W
	Plate Voltage (U_a)	≤ 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 (I_k)	≤ 65 mA
	Filament Current (I_f)	0.76 A
	Filament Voltage (U_f)	6.3 V
	Gain (μ)	19
	Grid 1 to filament capacitance (c_g1f)	0.15 pF
	Grid Circuit Resistance 1 (R_g1), Automatic Bias	1 MΩ
	Grid Circuit Resistance 1 (R_g1), Fixed Bias	0.3 MΩ
	Grid Voltage 1 (U_g1)	≥ -100 V, -7.3 V typical
	Grid Voltage 2 (U_g2)	≤ 300 V, 250 V typical
	Grid to Cathode Capacitance (c_g/k)	10 pF
	Grid to Plate Capacitance (c_a/g)	0.6 pF
	Heater to cathode voltage (U_k/f)	≤ 100 V
	Internal Resistance (R_i)	40 kΩ
	Item Diameter	22 mm
	Item Height	77.8 mm
	Plate Capacitance (c_a)	5.1 pF
	Plate Current (I_a)	48 mA
	Plate Dissipation (W_a)	≤ 12 W
	Plate Voltage (U_a)	≤ 300 V, 250 V typical
	Transconductance (S)	11.3 mA/V
T-EL84-JJ - Single version	Body Height	71.4 mm
	Cathode Current (I_k)	≤ 65 mA
	Filament Current (I_f)	0.76 A
	Filament Voltage (U_f)	6.3 V
	Gain (μ)	19
	Grid 1 to filament capacitance (c_g1f)	0.15 pF
	Grid Circuit Resistance 1 (R_g1), Automatic Bias	1 MΩ
	Grid Circuit Resistance 1 (R_g1), Fixed Bias	0.3 MΩ
	Grid Voltage 1 (U_g1)	≥ -100 V, -7.3 V typical
	Grid Voltage 2 (U_g2)	≤ 300 V, 250 V typical
	Grid to Cathode Capacitance (c_g/k)	10 pF
	Grid to Plate Capacitance (c_a/g)	0.6 pF
	Heater to cathode voltage (U_k/f)	≤ 100 V
	Internal Resistance (R_i)	40 kΩ
	Item Diameter	22 mm
	Item Height	77.8 mm
	Plate Capacitance (c_a)	5.1 pF
	Plate Current (I_a)	48 mA
	Plate Dissipation (W_a)	≤ 12 W
	Plate Voltage (U_a)	≤ 300 V, 250 V typical
	Transconductance (S)	11.3 mA/V

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Product Reviews

5.00 out of 5 based on 23 reviews

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5 out of 5

Direct make and model replacement for an Orange amp output tube that went south. Did the trick.

Richard - June 5th, 2019

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5 out of 5

Great tubes for my peavey classic 30 they sound great and give good life too!

David Hill - March 16th, 2019

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5 out of 5

I have had very good service life and sound with the JJ EL84's for the past several years. My customers like them too, and I recommend them for many modern and vintage amps.

Reverb Rey - March 16th, 2019

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5 out of 5

I needed some matched sets of EL84 tubes to install in two Crate Vintage Club combo amps equipped with non- adjustable fixed bias. JJ EL84 tubes were the only EL84 tubes I found that were perfectly biased to these Crate amps. The JJ tubes also sounded very good.

ohm-my - December 30th, 2018

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5 out of 5

ohm-my - December 30th, 2018

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5 out of 5

Long lasting reliable tubes ! Best fit for a Classic 30.

Anonymous - December 11th, 2018

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5 out of 5

Works fine. Cleaned up my noisy amplifier.

Carmen Marranco - September 10th, 2018

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5 out of 5

These tubes arrived fast, were matched, and sound great!

Stu - April 11th, 2018

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5 out of 5

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.

Garg - September 26th, 2017

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5 out of 5

A fine tube for a reasonable price.

Douglas Hatlelid - April 13th, 2016

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Questions and Answers

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I bought the power matched pair and noticed that one tubes filaments glow brighter than the other, is this normal? 1 answers

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Asked by Anonymous on October 14th, 2016.

Answers (1)

Matt H.

Staff Member

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.

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Do this work in a fender hot rod deluxe iii? 1 answers

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Asked by Anonymous on May 24th, 2017.

Answers (1)

Matt H.

Staff Member

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.

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Will this work on Blues jr? 1 answers

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Asked by Anonymous on May 31st, 2018.

Answers (1)

Matt H.

Staff Member

May 31st, 2018

The Blues Junior comes stock with a pair of EL84's and these would be an excellent choice for your amp.

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Are these T-EL84-JJ-mp already burned in ? 1 answers

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Asked by Anonymous on July 27th, 2018.

Answers (1)

CurtisG

July 27th, 2018

These are not burned in. Unfortunately, we do not offer a burned in version of these tubes at this time.

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Can these tubes work in a record player stereo amp From 1964? The one I pulled out was a 6BQ5 silvertone.1 answers

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Asked by Anonymous on August 28th, 2018.

Answers (1)

BradWbr

Staff Member

August 28th, 2018

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.

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Can you elaborate on "burned in". What does this really mean? Is this 10 hours, 50 hours, 100 hours? Should burning in be done at high volume? It seems that there is so much nebulous terminology in this world of guitars and amplifiers. Frankly, I am a little confused.1 answers

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Asked by Anonymous on November 8th, 2018.

Answers (1)

BradWbr

Staff Member

November 9th, 2018

For more information on the Apex Burn In process, please visit the Apex tube matching website: https://www.apexmatching.com/apex-burn

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