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Vacuum Tube - EL34, JJ Electronics
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.
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 |
|---|---|---|---|
| Single | T-EL34-JJ | 609722123020 | EL34 |
| Apex Matched Pair | T-EL34-JJ-MP | 609722123037 | |
| Apex Matched Quad | T-EL34-JJ-MQ | 609722123044 | |
| Apex Burned-In Matched Pair | T-EL34-JJ-MPB | 609722123051 | |
| Apex Matched Sextet | T-EL34-JJ-MS | 609722166881 | |
| Apex Burned-In Matched Quad | T-EL34-JJ-MQB | 609722123068 |
| Body Height | 98 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 Diameter | 33.3 mm | |
| Item Height | 112 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 Dimensions | Apex Burned-In Matched Pair version | T-EL34-JJ-MPB | 4.6 in. × 3.3 in. × 1.6 in. |
| Apex Burned-In Matched Quad version | T-EL34-JJ-MQB | 4.6 in. × 3.3 in. × 3.3 in. | |
| Apex Matched Pair version | T-EL34-JJ-MP | 1.6 in. × 3.3 in. × 4.6 in. | |
| Apex Matched Quad version | T-EL34-JJ-MQ | 3.3 in. × 3.3 in. × 4.6 in. | |
| Apex Matched Sextet version | T-EL34-JJ-MS | 13.8 in. × 3.3 in. × 1.6 in. | |
| Single version | T-EL34-JJ | 1.6 in. × 1.6 in. × 4.6 in. | |
| Weight (Packaging) | Apex Burned-In Matched Pair version | T-EL34-JJ-MPB | 0.266 lbs. |
| Apex Burned-In Matched Quad version | T-EL34-JJ-MQB | 0.532 lbs. | |
| Apex Matched Pair version | T-EL34-JJ-MP | 0.266 lbs. | |
| Apex Matched Quad version | T-EL34-JJ-MQ | 0.532 lbs. | |
| Apex Matched Sextet version | T-EL34-JJ-MS | 0.798 lbs. | |
| Single version | T-EL34-JJ | 0.133 lbs. |
| T-EL34-JJ-MP - Apex Matched Pair version | Body Height | 98 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 Diameter | 33.3 mm | |
| Item Height | 112 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 version | Body Height | 98 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 Diameter | 33.3 mm | |
| Item Height | 112 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 version | Body Height | 98 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 Diameter | 33.3 mm | |
| Item Height | 112 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 version | Body Height | 98 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 Diameter | 33.3 mm | |
| Item Height | 112 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 version | Body Height | 98 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 Diameter | 33.3 mm | |
| Item Height | 112 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 version | Body Height | 98 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 Diameter | 33.3 mm | |
| Item Height | 112 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 |
 Specification Sheet | All Models |
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Specifications, Files, and Documents
Questions and Answers
Click each question to see its answers.
1 answers
According to the information about Apex matched JJ EL34'so this process eliminates the need to set the bias is this correct? Thank you
Asked by Anonymous on December 29th, 2016.
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.
1 answers
Hi, the tubes i just bought are barely matched and on top of it, they blew right away. I took them to an amp tech had it biased and everything. I need to return them.
Asked by cwrichard on October 29th, 2017.
Please contact customer service at: [email protected] or 480-296-0890.
1 answers
Are these the new JJ EL34IIs?
Asked by Anonymous on February 13th, 2018.
No these are regular EL34's. For the EL34II's do a search for T-EL34II-JJ.
1 answers
I was going to order these as an Apex matched pair. Are they shipped as 2 in one box, or do I just get 2 boxes with one in each? Thanks.
Asked by Anonymous on October 27th, 2022.
October 27th, 2022
Staff Member
Each tube is in their own individual box. Matched sets will have the Apex tape band around the boxes to keep them together.
1 answers
what is the burn in process for tubes?
Asked by VanillaGorilla on February 23rd, 2023.
February 27th, 2023
Staff Member
You can read about the Apex Burn-in process here: https://www.apexmatching.com/apex-burn
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
These JJ Electronics EL34 main tubes have an excellent tone. They are just as good as the Mesa factory equipment. Amplified parts got these tube to me in 3 days! Ecellent service!!!
These JJ Electronics EL34 main tubes have an excellent tone. They are just as good as the Mesa factory equipment. Amplified parts got these tube to me in 3 days! Ecellent service!!!
Seems to work well.
I like the JJ tubes EL34 and 12AX7 .I chose a different set of 12 AX7s on my current order because you said the JJ 12AX7s were out of stock .
Fast shipping.
Have not used them yet, but JJ's always find a home, in my Musicman HD130-R
... and now one of them died and blew a fuse.
The matching on these were nice and tight so I'm guessing these tubes are just junk.
Stick with inexpensive 'Marshall-labeled' tubes- they sound great and last for years. 40+ years with zero problems.
These don't go well with 1959HW or YJM100.
The low is muddy and there is a weird lower-mid honk that is VERY distracting. Highs aren't great either.
These things get worse as the tube gets more warmed up whereas most tubes sound better as they get warmer.
The JJ EL34 II's are only just ever so slightly better but not much. (I bought a set of each to try)
For Plexi's I guess I will never again venture away from Svetlana, Mullard, and Electro Harmonix. Those sound great every time.
Purchased a matched quad set with the burned in option for my EVH 5153 EL34 Stealth
Very satisfied