Vacuum Tube - EL34, Electro-Harmonix

Vacuum Tube - EL34, Electro-Harmonix

Electro-Harmonix
Pictured: Single
Pictured: Single
Pictured: Apex Matched Pair
Pictured: Apex Matched Pair
Pictured: Apex Matched Quad
Pictured: Apex Matched Quad
Click to zoom in
Pictured: SinglePictured: Apex Matched PairPictured: Apex Matched Quad
Customer Images:
No Images yet! Submit a product image below!
Starting at: $21.50
In Stock

Superior "Black base" high-voltage power pentode. Most common power pentode found in British amplifiers such as Marshall, Hiwatt, Laney, and Sound City. The EL34EH defines the classic British rock sound of the 1960s and 1970s. Perfect EL34 for vintage equipment and for improved performance of modern amps. Extremely musical and predictable, with a sound that is rich, smooth, and detailed without being edgy.

  • Originally found in vintage British amplifiers such as Marshall, Hiwatt, and others
  • Also suitable for HiFi
  • 6CA7 equivalent

According to the technical journal, Vacuum Tube Valley, "The Electro-Harmonix EL34EH is balanced throughout the entire music spectrum. Bass goes deep and is tight, mids are sweet and well defined, and highs are detailed and extended."

Apex Tube Matching
Matched versions of this tube use Apex Matching
RoHS Compliant
SKU:
T-EL34-EH
Item ID:
004840
Brand:
Electro-Harmonix, Apex Matched
Type:
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Apex Matched PairT-EL34EH-MP609722124225
Apex Matched QuadT-EL34EH-MQ609722124232
SingleT-EL34EH683274021669
Product Measurements by Type
Capacitance, Grid to Cathode16 pF
Capacitance, Grid to Heater16 pF
Capacitance, Grid to Screen16 pF
Capacitance, Grid to Suppressor16 pF
Capacitance, Plate to Cathode7.2 pF
Capacitance, Plate to Heater7.2 pF
Capacitance, Plate to Screen7.2 pF
Capacitance, Plate to Suppressor7.2 pF
Capacitance, grid to plate1.2 pF
Cathode Current (Ik)150 mA
Grid Circuit Resistance (Rg), Fixed Bias100 kΩ
Grid Circuit Resistance (Rg), Self Bias0.5 MΩ
Heater Current1.5 A
Heater Voltage6.0 V - 6.5 V
Heater to Cathode Voltage± 200 V
Plate Dissipation (Wa)25 W
Plate Resistance (Ra)15 kΩ
Plate Voltage (Ua)800 V
Screen Dissipation7.5 W
Screen Voltage425 V
Transconductance (S)11 mA/V
Packaging Information
Packaging DimensionsApex Matched Pair versionT-EL34EH-MP5.1 in. × 3.5 in. × 1.6 in.
Apex Matched Quad versionT-EL34EH-MQ5.1 in. × 3.5 in. × 3.5 in.
Single versionT-EL34EH1.8 in. × 1.8 in. × 5.1 in.
Weight (Packaging)Apex Matched Pair versionT-EL34EH-MP0.24 lbs.
Apex Matched Quad versionT-EL34EH-MQ0.48 lbs.
Single versionT-EL34EH0.12 lbs.
Product Measurements by Item
T-EL34EH - Single versionCapacitance, Grid to Cathode16 pF
Capacitance, Grid to Heater16 pF
Capacitance, Grid to Screen16 pF
Capacitance, Grid to Suppressor16 pF
Capacitance, Plate to Cathode7.2 pF
Capacitance, Plate to Heater7.2 pF
Capacitance, Plate to Screen7.2 pF
Capacitance, Plate to Suppressor7.2 pF
Capacitance, grid to plate1.2 pF
Cathode Current (Ik)150 mA
Grid Circuit Resistance (Rg), Fixed Bias100 kΩ
Grid Circuit Resistance (Rg), Self Bias0.5 MΩ
Heater Current1.5 A
Heater Voltage6.0 V - 6.5 V
Heater to Cathode Voltage± 200 V
Plate Dissipation (Wa)25 W
Plate Resistance (Ra)15 kΩ
Plate Voltage (Ua)800 V
Screen Dissipation7.5 W
Screen Voltage425 V
Transconductance (S)11 mA/V
T-EL34EH-MP - Apex Matched Pair versionCapacitance, Grid to Cathode16 pF
Capacitance, Grid to Heater16 pF
Capacitance, Grid to Screen16 pF
Capacitance, Grid to Suppressor16 pF
Capacitance, Plate to Cathode7.2 pF
Capacitance, Plate to Heater7.2 pF
Capacitance, Plate to Screen7.2 pF
Capacitance, Plate to Suppressor7.2 pF
Capacitance, grid to plate1.2 pF
Cathode Current (Ik)150 mA
Grid Circuit Resistance (Rg), Fixed Bias100 kΩ
Grid Circuit Resistance (Rg), Self Bias0.5 MΩ
Heater Current1.5 A
Heater Voltage6.0 V - 6.5 V
Heater to Cathode Voltage± 200 V
Plate Dissipation (Wa)25 W
Plate Resistance (Ra)15 kΩ
Plate Voltage (Ua)800 V
Screen Dissipation7.5 W
Screen Voltage425 V
Transconductance (S)11 mA/V
T-EL34EH-MQ - Apex Matched Quad versionCapacitance, Grid to Cathode16 pF
Capacitance, Grid to Heater16 pF
Capacitance, Grid to Screen16 pF
Capacitance, Grid to Suppressor16 pF
Capacitance, Plate to Cathode7.2 pF
Capacitance, Plate to Heater7.2 pF
Capacitance, Plate to Screen7.2 pF
Capacitance, Plate to Suppressor7.2 pF
Capacitance, grid to plate1.2 pF
Cathode Current (Ik)150 mA
Grid Circuit Resistance (Rg), Fixed Bias100 kΩ
Grid Circuit Resistance (Rg), Self Bias0.5 MΩ
Heater Current1.5 A
Heater Voltage6.0 V - 6.5 V
Heater to Cathode Voltage± 200 V
Plate Dissipation (Wa)25 W
Plate Resistance (Ra)15 kΩ
Plate Voltage (Ua)800 V
Screen Dissipation7.5 W
Screen Voltage425 V
Transconductance (S)11 mA/V

My Project Lists

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

Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet130.78 KB

Questions and Answers

No questions have been asked about this product.

Product Reviews

4.38 out of 5 based on 8 reviews
- April 23rd, 2021
5 out of 5

Just bought a pair from you guys. Can't believe how closely they are matched! I've bought several things from your store throughout the years and have always been satisfied. Thank you!

- April 9th, 2021
5 out of 5

I've been using these EH EL34's in my '81 Marshall 2204 for over a decade. These tubes sound great & a real bargain, too! And AES did a great job as always filling & shipping my order quickly.

- March 26th, 2018
3 out of 5

I bought a set of these tubes for my Germino 68 Plexi replica. What I liked about them was tightness, good detail, slightly suppressed low end, and the high notes had a really nice texture kinda gritty and still clear (don't know of any better descriptive words. What I didn't like was the low notes sounded a little sterile or almost robotic in an electronic way especially with chunking palm mutes while riffing if that makes sense. I liked them but I stuck the JJE34Ls back in bc they sound amazing with that amp.

- January 21st, 2016
5 out of 5

When I got them they each sat at 31mA, no fluctuations. That is after I had accidentally set the bias way too hot. I had them making some clinking sounds for about 5-10 seconds. I thought for sure I had fried them and they were done for. I fixed the bias issue, and they were right back at 31mA each. Two weeks later they have settled at 31mA and 30mA. That is better than any pair of matched tubes I have ever bought.

They sound fantastic, and break up nicely without going muddy. They definitely held their own even though I sent some tube killing current through them, and still sounding great today.

Will certainly buy again.

- October 30th, 2015
5 out of 5

Equipment: Scott 272 integrated stereo

Problem: Has a quad of original SED installed, has been performing well for 10 years. Filament on one tube started going recently (shake the tube a little and it will start working again for a bit). Figured that since bias and balance are adjustable, why not buy ONE EH and see if I can get away with it.

The verdict: PERFECT. Slapped the one tube in, let amp warm up a few minutes, had to re-bias and balance ever so slightly. No way to tell sonically there is an "impostor" tube in there. Let it warm up 3-4 hours, conduct all tests again. Nothing moved!

The future: Winged C now too expensive. Will evaluate this arrangement. If the current EH holds up, I will buy three more and replace the remaining SED tubes as they fail with those.

A little puzzled with the reviewer saying it is better to buy the Mullard reissue: blow up the pictures and you will see it is the same structure as the EH.

- October 15th, 2015
5 out of 5

Excellent tube, to anyone searching for english tone.

- March 27th, 2015
2 out of 5

Shortest lifespan, probably the worst tone and worst performing EL34 I have used lately. I have a large stash of UK made Mullards, Philips, Telefunken, Tesla (not JJ) and Matsushitas in my shop, and these are total a joke compared to those. Spend a few more dollars and get the Tung Sol re-issue, or Mullard re-issue, or save a few bucks and buy Chinese valves. Or you can buy JJs and have their weird unique tone, but the JJs should last longer too.

- July 14th, 2014
5 out of 5

Installed the quad set of EL-34 tubes, very close match, bias set and does not drift, tubes balanced and sound quite lovely indeed.

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.