Vacuum Tube - EL34, JJ Electronics

Vacuum Tube - EL34, JJ Electronics

JJ Electronics
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Starting at: $16.50
Product Options
  • Apex Burned-In Matched Quad (T-EL34-JJ-MQB)
are currently out of stock and will be placed on backorder. This product has substitutes available! Check them out.

The JJ Electronic EL34 is another classic from JJ. This tube features a rugged construction leading to an incredibly reliable EL34 with astonishing tone. Overall the sound is nicely balanced with tight lows, a rich and dynamic mid range and clear highs. The JJ EL34 is a great replacement for guitar amplifiers and stereo amps as well.

Apex Tube Matching
Matched versions of this tube use Apex Matching
Choose burned-in tubes for maximum stability and performance.
SKU:
T-EL34-JJ
Item ID:
004841
Brand:
JJ Electronics, Apex Matched
RoHS Compliant
Part Numbers
Single or MatchedOur Part NumberUPC/EANJJ Electronics Part Number
SingleT-EL34-JJ609722123020 EL34
Apex Matched PairT-EL34-JJ-MP609722123037
Apex Matched QuadT-EL34-JJ-MQ609722123044
Apex Burned-In Matched PairT-EL34-JJ-MPB609722123051
Apex Matched SextetT-EL34-JJ-MS609722166881
Apex Burned-In Matched QuadT-EL34-JJ-MQB609722123068
Product Measurements by Type
Body Height98 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 Current 2 (Ig2)14.9 mA
Grid Voltage 1 (Ug1)-10 V to -13.5 V typical
Grid Voltage 2 (Ug2)≤ 450 V, 265 V typical
Grid Voltage 3 (Ug3)0 V typical
Grid capacitance (cg1)15.5 pF
Grid to Plate Capacitance (ca/g)1.3 pF
Heater to cathode resistance (Rk/f)20 kΩ
Heater to cathode voltage (Uk/f)≤ 100 V
Internal Resistance (Ri)15 kΩ
Item Diameter33.3 mm
Item Height112 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 Information
Packaging DimensionsApex Burned-In Matched Pair versionT-EL34-JJ-MPB4.6 in. × 3.3 in. × 1.6 in.
Apex Burned-In Matched Quad versionT-EL34-JJ-MQB4.6 in. × 3.3 in. × 3.3 in.
Apex Matched Pair versionT-EL34-JJ-MP1.6 in. × 3.3 in. × 4.6 in.
Apex Matched Quad versionT-EL34-JJ-MQ3.3 in. × 3.3 in. × 4.6 in.
Apex Matched Sextet versionT-EL34-JJ-MS13.8 in. × 3.3 in. × 1.6 in.
Single versionT-EL34-JJ1.6 in. × 1.6 in. × 4.6 in.
Weight (Packaging)Apex Burned-In Matched Pair versionT-EL34-JJ-MPB0.266 lbs.
Apex Burned-In Matched Quad versionT-EL34-JJ-MQB0.532 lbs.
Apex Matched Pair versionT-EL34-JJ-MP0.266 lbs.
Apex Matched Quad versionT-EL34-JJ-MQ0.532 lbs.
Apex Matched Sextet versionT-EL34-JJ-MS0.798 lbs.
Single versionT-EL34-JJ0.133 lbs.
Product Measurements by Item
T-EL34-JJ-MP - Apex Matched Pair versionBody Height98 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 Current 2 (Ig2)14.9 mA
Grid Voltage 1 (Ug1)-10 V to -13.5 V typical
Grid Voltage 2 (Ug2)≤ 450 V, 265 V typical
Grid Voltage 3 (Ug3)0 V typical
Grid capacitance (cg1)15.5 pF
Grid to Plate Capacitance (ca/g)1.3 pF
Heater to cathode resistance (Rk/f)20 kΩ
Heater to cathode voltage (Uk/f)≤ 100 V
Internal Resistance (Ri)15 kΩ
Item Diameter33.3 mm
Item Height112 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-EL34-JJ-MQ - Apex Matched Quad versionBody Height98 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 Current 2 (Ig2)14.9 mA
Grid Voltage 1 (Ug1)-10 V to -13.5 V typical
Grid Voltage 2 (Ug2)≤ 450 V, 265 V typical
Grid Voltage 3 (Ug3)0 V typical
Grid capacitance (cg1)15.5 pF
Grid to Plate Capacitance (ca/g)1.3 pF
Heater to cathode resistance (Rk/f)20 kΩ
Heater to cathode voltage (Uk/f)≤ 100 V
Internal Resistance (Ri)15 kΩ
Item Diameter33.3 mm
Item Height112 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-EL34-JJ-MS - Apex Matched Sextet versionBody Height98 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 Current 2 (Ig2)14.9 mA
Grid Voltage 1 (Ug1)-10 V to -13.5 V typical
Grid Voltage 2 (Ug2)≤ 450 V, 265 V typical
Grid Voltage 3 (Ug3)0 V typical
Grid capacitance (cg1)15.5 pF
Grid to Plate Capacitance (ca/g)1.3 pF
Heater to cathode resistance (Rk/f)20 kΩ
Heater to cathode voltage (Uk/f)≤ 100 V
Internal Resistance (Ri)15 kΩ
Item Diameter33.3 mm
Item Height112 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-EL34-JJ-MPB - Apex Burned-In Matched Pair versionBody Height98 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 Current 2 (Ig2)14.9 mA
Grid Voltage 1 (Ug1)-10 V to -13.5 V typical
Grid Voltage 2 (Ug2)≤ 450 V, 265 V typical
Grid Voltage 3 (Ug3)0 V typical
Grid capacitance (cg1)15.5 pF
Grid to Plate Capacitance (ca/g)1.3 pF
Heater to cathode resistance (Rk/f)20 kΩ
Heater to cathode voltage (Uk/f)≤ 100 V
Internal Resistance (Ri)15 kΩ
Item Diameter33.3 mm
Item Height112 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-EL34-JJ-MQB - Apex Burned-In Matched Quad versionBody Height98 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 Current 2 (Ig2)14.9 mA
Grid Voltage 1 (Ug1)-10 V to -13.5 V typical
Grid Voltage 2 (Ug2)≤ 450 V, 265 V typical
Grid Voltage 3 (Ug3)0 V typical
Grid capacitance (cg1)15.5 pF
Grid to Plate Capacitance (ca/g)1.3 pF
Heater to cathode resistance (Rk/f)20 kΩ
Heater to cathode voltage (Uk/f)≤ 100 V
Internal Resistance (Ri)15 kΩ
Item Diameter33.3 mm
Item Height112 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-EL34-JJ - Single versionBody Height98 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 Current 2 (Ig2)14.9 mA
Grid Voltage 1 (Ug1)-10 V to -13.5 V typical
Grid Voltage 2 (Ug2)≤ 450 V, 265 V typical
Grid Voltage 3 (Ug3)0 V typical
Grid capacitance (cg1)15.5 pF
Grid to Plate Capacitance (ca/g)1.3 pF
Heater to cathode resistance (Rk/f)20 kΩ
Heater to cathode voltage (Uk/f)≤ 100 V
Internal Resistance (Ri)15 kΩ
Item Diameter33.3 mm
Item Height112 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

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet471.55 KB

Questions and Answers

Click each question to see its answers.
Asked by Stratman11 on December 28th, 2016.
Matt H.
December 29th, 2016
Staff Member
No, it depends on your amp. With any retube, you may need to make adjustments to your amp depending on the type of bias it has. Your amp will either be fixed adjustable bias (has bias pot on the back of the amp) , Fixed non-adjustable bias (bias is fixed by a resistor in your amp), or cathode bias (self biasing no bias required). The manual for your amp should be able to tell you what type of bias you have. Rebiasing am amp is something that should be done by an experienced tech.
Asked by Anonymous on February 11th, 2018.
Matt H.
February 13th, 2018
Staff Member
No these are regular EL34's. For the EL34II's do a search for T-EL34II-JJ.

Product Reviews

4.80 out of 5 based on 10 reviews
- March 7th, 2021
5 out of 5

Very robust tube. Like a Timex watch, it takes a beating and keeps on ticking.

- January 21st, 2021
5 out of 5

After reading reviews about how my Diamond Nitrox tube amp "should sound," I knew mine was off a bit. The matched burned in quad of JJ EL34 that my amp tech suggested did the trick. My Nitrox came alive and was immediately put in que to be used in the next recording session. Great deal on all my tube needs and always in stock at Antique Radio.

- August 11th, 2020
3 out of 5

I am disappointed in these tubes. I have had excellent results with other JJ tubes, but have had at least 4 tube failures of the EL34 tubes. All fail the same way - they get leaky, which reduces the bias, which causes them to red-plate and die. I had one that arced over (that I have seen - others may have, but didn't "catch them in the act"). Additionally, they all seem to fail out of warranty, in spite of the fact that they have not been used much at all. this is an unacceptable cost to us as a servicer - profit margins are slim enough.

I have much better luck with the JJ 6CA7. It's a much more substantial tube, drops right in (although the bias is slightly different), sounds a little more robust, and have not had the failures I have had with the EL34. I think JJ has to look at their processes on their EL34 production line.

- May 8th, 2020
5 out of 5

These matched and burned-in EL34's tracked each other very closely, less than 1ma difference over a wide bias range and perform very well. I'm happy with them.

- June 1st, 2019
5 out of 5

It’s The best for price

- December 29th, 2018
5 out of 5

Great tubes! Arrived in no time and the pair are very well matched.

- April 7th, 2016
5 out of 5

I think these JJ EL34s are top-notch. They're solid power amp tubes that do their job, that is that they faithfully and transparently amplify well. I'm happy with them.

- February 29th, 2016
5 out of 5

This is the tube for guys with early 70s Marshalls that are known for high plate voltage I have a 72 super bass with over 500 plate volts and this tube can take it I tried a well known popular tube that I wont mention and one of the 34s burnt after one gig I called the guys at tubesandmore and they were very understanding and I sent the quad set with the bad tube back and ordered the jjs and with a little eq twiking they work great thanks again tubesandmore.

- January 10th, 2015
5 out of 5

After the transformer was installed the new EL34's lookin' good so far

- November 16th, 2014
5 out of 5

Great JJ el34 tubes. They arrived quickly and well protected in their package.

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.