Vacuum Tube - 6CA7, Electro-Harmonix

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Vacuum Tube - 6CA7, Electro-Harmonix

Starting at: $24.85
In stock

Electro-Harmonix 6CA7 Vacuum Tube Big bottle beam-tetrode version of EL34. Perfect EL34 replacement for Musicman amplifiers.

RoHS Compliant
Item ID:
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Matched PairT-6CA7-EH-MP609722128384
Matched QuadT-6CA7-EH-MQ609722128391
Product Measurements
Cathode Current (Ik)150 mA
Cathode to Heater Voltage± 300 V
Grid 1 Circuit Resistance, Automatic Bias0.7 MΩ
Grid 1 Circuit Resistance, Fixed Bias0.5 MΩ
Grid 1 Voltage-100 V
Grid 2 Current≤ 20 mA
Grid 2 Dissipation Power8 W
Grid 2 Voltage425 V
Heater Current1.5 A
Heater Voltage5.7 V - 7.0 V
Item Diameter38 mm
Item Height110 mm
Non-linear Harmonic Distortion13.5%
Output Power (POut)≥ 9.0 W
Plate Current (Ia)100 ± 20 mA
Plate Dissipation (Wa)25 W
Plate Voltage (Ua)800 V
Transconductance (S)10 mA/V
Packaging Information
Packaging DimensionsMatched Pair version4.8 in. × 3.5 in. × 1.8 in.
Matched Quad version4.8 in. × 3.5 in. × 3.5 in.
Single version1.8 in. × 1.8 in. × 4.8 in.
Weight (Packaging)Matched Pair version0.28 lbs.
Matched Quad version0.56 lbs.
Single version0.14 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet308.48 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on September 2nd, 2017.
Matt H
September 6th, 2017
According to our limited resources your amp comes with a single 12AX7. The 12AX7 is a preamp tube and the 6CA7 is a poweramp tube and these are not compatible with each other.
Asked by Anonymous on September 2nd, 2017.
Matt H
September 6th, 2017
We feel that the EH 6CA7 is a great option in a new production tube. We do not have any direct experience in comparing the EH to a Sylvania but they are compatible.
Asked by Anonymous on September 6th, 2017.
Matt H
September 6th, 2017
Yes, these NIB (new in box) and come with the manufacturer's full warranty.
Asked by Anonymous on September 6th, 2017.
Matt H
September 6th, 2017
Yes, this would be a matched pair of two tubes.

Product Reviews

5.00 out of 5 based on 2 reviews
- July 7th, 2019
5 out of 5

I've used this output tube for years in a Hiwatt DR504 head and they hold up very well and sound good. A friend also uses them in his Sovtek Mig 60 amp with similar results. For me the EH output tubes have been very good durability wise but sort of hit and miss soundwise the 6CA7EH is a hit.

- October 9th, 2011
5 out of 5

This is EASILY, by far the best 6CA7 big bottle currently available. The GE 6CA7 was the American EL34 and my stock of originals is too precious to run into the ground noodling and practicing. These thing are an extremely close copy, and not just lookalikes either. The Original GE's , with all due respect to those who will swear differently, didnt sound like "half 6L6 - half EL34", they are all EL34. Sometimes I think they sound more like Mullards than Mullards.Not as harmonically rich (EL34 tubes arent very harmonically rich compared to 6L6, 6V6 or 6550 tubes anyway) but they have absolutely microscopic levels of detail and the same forward midrange which the Royal Phillips familly tubes were known for. Very much like the European EL34 .Given the expectation that many people have that the big bottles will be somehow, differently flavored, (than an EL34), i was suprised to hear this tube perform just as its supposed to. Just like the originals. The SED,"Winged C" EL34 and the 6CA7EH are far and away the Best EL34 types in production anywhere in the world today.

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