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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Questions and Answers
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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 Stratman11 on December 28th, 2016.
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.
1 answers
Are these the new JJ EL34IIs or are they the older ones before 2017?
Asked by Anonymous on February 11th, 2018.
February 13th, 2018
Staff Member
No these are regular EL34's. For the EL34II's do a search for T-EL34II-JJ.
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
Haven’t try yet(still building amp) but reasonably priced
The sound is perfect for my Fryette 50/50 in class A. Thanks to the team at A.E.S.
Very robust tube. Like a Timex watch, it takes a beating and keeps on ticking.
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.
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.
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.
It’s The best for price
Great tubes! Arrived in no time and the pair are very well matched.
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.
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.