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Vacuum Tube - EL34 II, JJ Electronics, Pentode

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SKU:	T-EL34II-JJ
Item ID:	039636

Starting at: $16^.00

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Type

Pentode Power

Vacuum Tubes Apex Matched

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.

Matched versions of this tube use Apex Matching

Part Numbers
Single or Matched	Our Part Number	UPC/EAN
Single	T-EL34II-JJ	841358101649
Apex Matched Pair	T-EL34II-JJ-MP	841358101663
Apex Matched Quad	T-EL34II-JJ-MQ	841358101670

RoHS Compliant

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Specifications, Files, and Documents

Specification Sheet

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Product Measurements (click to expand)

Product Measurements
Body Height		98 mm
Cathode Current (I_k)		≤ 150 mA
Filament Current (I_f)		1.5 A
Filament Voltage (U_f)		6.3 V
Gain (μ_g2/g2)		11
Grid 2 Dissipation (wg2)		8 W
Grid Capacitance (c_g1)		15.5 pF
Grid Current 2 (I_g2)		14.9 mA
Grid Voltage 1 (U_g1)		-13.5 V typical
Grid Voltage 2 (U_g2)		≤ 450 V, 265 V typical
Grid Voltage 3 (U_g3)		0 V typical
Grid to Plate Capacitance (c_a/g)		1.3 pF
Heater to Cathode Voltage (U_k/f)		≤ 100 V
Heater to cathode resistance (R_k/f)		20 kΩ
Internal Resistance (R_i)		15 kΩ
Item Diameter		33.3 mm
Item Height		112 mm
Plate Capacitance (c_a)		10 pF
Plate Current (I_a)		100 mA
Plate Dissipation (W_a)		≤ 25 W
Plate Voltage (U_a)		≤ 800 V, 250 V typical
Transconductance (S)		11 mA/V

Packaging Information
Packaging Dimensions	Apex Matched Pair version	4.6 in. × 3.21 in. × 1.65 in.
	Apex Matched Quad version	4.6 in. × 3.2 in. × 3.21 in.
	Single version	1.59 in. × 1.59 in. × 4.61 in.
Weight (Packaging)	Apex Matched Pair version	0.266 lbs.
	Apex Matched Quad version	0.532 lbs.
	Single version	0.133 lbs.

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Product Reviews

5.00 out of 5 based on 2 reviews

5 out of 5

Precisely matched tube set is a breeze to bias!

Tom Schupbach - November 28th, 2019

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5 out of 5

Recently retubed a Marshall 100 watt plexi. The old Svetlana EL34s were replaced w JJEL34ii power tubes. Balanced and biased a bit hotter than factory....the results are excellent, rich tone with deep tight bothom end and much smoother mids and highs. I am quite pleased

Garry - October 14th, 2015

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Questions and Answers

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I have a 30 watt marshall artist with one 12ax7 and 2 el34 tubes. How much lower would the output volume be? 30 watts is way too loud for me.1 answers

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Asked by Anonymous on August 27th, 2015.

Answers (1)

JustinG

Staff Member

Top Contributor

August 27th, 2015

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.

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Any significant tonal difference?1 answers

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Asked by Anonymous on August 31st, 2015.

Answers (1)

JustinG

Staff Member

Top Contributor

August 31st, 2015

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.

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I am looking to replace tubes in an Apache transmitter that used EL34/6CA7 tubes (2) in a modulator for Amplitude Modulation operation. The originals were made for Heathkit. The important data is not on this site to insure replacements have same operational curves and bias/plate voltage - current - dissipation. Any leads?1 answers

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Asked by Anonymous on April 4th, 2017.

Answers (1)

Matt H.

Staff Member

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: info@apexmatching.com

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Are these compatible with my mark 111 boogie?1 answers

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Asked by Anonymous on October 5th, 2017.

Answers (1)

Matt H.

Staff Member

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.

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