Vacuum Tube - EL34 II, JJ Electronics, Pentode

JJ Electronics
Vacuum Tube - EL34 II, JJ Electronics, Pentode image 1
Click to zoom in
Customer Images:
No Images yet! Submit a product image below!

Vacuum Tube - EL34 II, JJ Electronics, Pentode

Starting at: $16.00
In stock

The JJ Electronic EL34 II is a different construction of the classic EL34 tube that offers a different tonal palette than the original. This tube has a more compact plate structure than standard EL34’s. The JJ EL34 II has an increased low to low-mid end with plenty of headroom to spare. This tube has a thick and tight bass response. The mids are balanced and harmonically rich with pleasantly smooth highs. The JJ EL34 II is stronger than the original but not harsh sounding in any way. When overdriven, this tube has a warm and dynamic distortion that rivals many vintage tubes.

Apex Tube Matching
Matched versions of this tube use Apex Matching
RoHS Compliant
Item ID:
JJ Electronics, Apex Matched
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Apex Matched PairT-EL34II-JJ-MP841358101663
Apex Matched QuadT-EL34II-JJ-MQ841358101670
Product Measurements
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 Capacitance (cg1)15.5 pF
Grid Current 2 (Ig2)14.9 mA
Grid Voltage 1 (Ug1)-13.5 V typical
Grid Voltage 2 (Ug2)≤ 450 V, 265 V typical
Grid Voltage 3 (Ug3)0 V typical
Grid to Plate Capacitance (ca/g)1.3 pF
Heater to Cathode Voltage (Uk/f)≤ 100 V
Heater to cathode resistance (Rk/f)20 kΩ
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 Matched Pair version4.6 in. × 3.21 in. × 1.65 in.
Apex Matched Quad version4.6 in. × 3.2 in. × 3.21 in.
Single version1.59 in. × 1.59 in. × 4.61 in.
Weight (Packaging)Apex Matched Pair version0.266 lbs.
Apex Matched Quad version0.532 lbs.
Single version0.133 lbs.

My Project Lists

You must be logged in to add items to a project list.

Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet495.76 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on August 27th, 2015.
August 27th, 2015
Staff Member
Top Contributor
The JJ EL34II tube will offer earlier power tube breakup than a standard JJ EL34 but will not change the overall output of your amplifier in a significant way. Both tubes are rated at 25W so the difference would be in the plate structure which allows you to achieve a slightly tamer output with earlier breakup.
Asked by Anonymous on April 4th, 2017.
Matt H
April 4th, 2017
These are Apex matched tubes and the matching process is a bit different from the standard matching procedures. For more information please contact Apex Matching at:
Asked by Anonymous on April 4th, 2017.
Matt H
April 4th, 2017
The EL34 II has a different, narrower plate structure which produces a tight, creamy overdrive distortion at a lower overall acoustic volume level as compared to a JJ EL34.
Asked by Anonymous on October 5th, 2017.
Matt H
October 5th, 2017
If your amp calls for EL34's then these should work. You will want to specify "middle numbers" in the notes section of the checkout process for compatibility with your Boogie.

Product Reviews

1.00 out of 5 based on 1 reviews
- June 19th, 2019
1 out of 5

Ordered an Apex matched quad, They biased at 31, 31, 35, 36 I called and got the ok to ship back which cost me $20. I get a text back from Westley stating they were perfectly matched and that they were sending them back which cost me another $10. Not too happy with the service.

Don't see what you're looking for? Send us your product suggestions!