Vacuum Tube - 6CA7, JJ Electronics

Vacuum Tube - 6CA7, JJ Electronics

JJ Electronics
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The JJ Electronic 6CA7 is a true to form reproduction of a classic tube that will work in most EL34 amps. The 6CA7 is often considered the American cousin to the British EL34. Sonically, this tube is closer to a 6L6 than an EL34 but without the sometimes harsh high end of the 6L6. The JJ 6CA7 offers warm highs with punchy articulate mids and tight lows. Wielding even more power than a KT77, this tube is a great choice for people looking for a change in their EL34 amp’s tone or want to push their levels that much further.

Apex Tube Matching
Matched versions of this tube use Apex Matching
Choose burned-in tubes for maximum stability and performance.
SKU:
T-6CA7-JJ
Item ID:
004661
Brand:
JJ Electronics, Apex Matched
RoHS Compliant
Part Numbers
Single or MatchedOur Part NumberUPC/EANJJ Electronics Part Number
Apex Matched PairT-6CA7-JJ-MP609722127486
Apex Matched QuadT-6CA7-JJ-MQ609722127493
Apex Burned-In Matched PairT-6CA7-JJ-MPB609722148801
Apex Burned-In Matched QuadT-6CA7-JJ-MQB609722148818
SingleT-6CA7-JJ609722127479 6CA7
Product Measurements by Type
Body Height100 mm
Cathode Current (Ik)≤ 150 mA
Filament Current (If)1.5 A
Filament Voltage (Uf)6.3 V
Grid 2 dissipation (Wg2)≤ 8 W
Grid Voltage 1 (Ug1)≥ -100 V, 32 V typical
Grid Voltage 2 (Ug2)≤ 500 V, 400 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)1 pF
Heater to cathode voltage (Uk/f)≤ 200 V
Internal Resistance (Ri)24 kΩ
Item Diameter38 mm
Item Height115 mm
Plate Capacitance (ca)9 pF
Plate Current (Ia)50 mA
Plate Dissipation (Wa)≤ 25 W
Plate Voltage (Ua)≤ 800 V, 400 V typical
Transconductance (S)9.5 mA/V
Packaging Information
Packaging DimensionsApex Burned-In Matched Pair versionT-6CA7-JJ-MPB4.5 in. × 3.3 in. × 1.8 in.
Apex Burned-In Matched Quad versionT-6CA7-JJ-MQB4.5 in. × 3.3 in. × 3.3 in.
Apex Matched Pair versionT-6CA7-JJ-MP1.9 in. × 3.3 in. × 4.6 in.
Apex Matched Quad versionT-6CA7-JJ-MQ3.3 in. × 3.3 in. × 4.6 in.
Single versionT-6CA7-JJ1.6 in. × 1.6 in. × 4.6 in.
Weight (Packaging)Apex Burned-In Matched Pair versionT-6CA7-JJ-MPB0.3 lbs.
Apex Burned-In Matched Quad versionT-6CA7-JJ-MQB0.6 lbs.
Apex Matched Pair versionT-6CA7-JJ-MP0.3 lbs.
Apex Matched Quad versionT-6CA7-JJ-MQ0.6 lbs.
Single versionT-6CA7-JJ0.15 lbs.
Product Measurements by Item
T-6CA7-JJ-MP - Apex Matched Pair versionBody Height100 mm
Cathode Current (Ik)≤ 150 mA
Filament Current (If)1.5 A
Filament Voltage (Uf)6.3 V
Grid 2 dissipation (Wg2)≤ 8 W
Grid Voltage 1 (Ug1)≥ -100 V, 32 V typical
Grid Voltage 2 (Ug2)≤ 500 V, 400 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)1 pF
Heater to cathode voltage (Uk/f)≤ 200 V
Internal Resistance (Ri)24 kΩ
Item Diameter38 mm
Item Height115 mm
Plate Capacitance (ca)9 pF
Plate Current (Ia)50 mA
Plate Dissipation (Wa)≤ 25 W
Plate Voltage (Ua)≤ 800 V, 400 V typical
Transconductance (S)9.5 mA/V
T-6CA7-JJ-MQ - Apex Matched Quad versionBody Height100 mm
Cathode Current (Ik)≤ 150 mA
Filament Current (If)1.5 A
Filament Voltage (Uf)6.3 V
Grid 2 dissipation (Wg2)≤ 8 W
Grid Voltage 1 (Ug1)≥ -100 V, 32 V typical
Grid Voltage 2 (Ug2)≤ 500 V, 400 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)1 pF
Heater to cathode voltage (Uk/f)≤ 200 V
Internal Resistance (Ri)24 kΩ
Item Diameter38 mm
Item Height115 mm
Plate Capacitance (ca)9 pF
Plate Current (Ia)50 mA
Plate Dissipation (Wa)≤ 25 W
Plate Voltage (Ua)≤ 800 V, 400 V typical
Transconductance (S)9.5 mA/V
T-6CA7-JJ-MPB - Apex Burned-In Matched Pair versionBody Height100 mm
Cathode Current (Ik)≤ 150 mA
Filament Current (If)1.5 A
Filament Voltage (Uf)6.3 V
Grid 2 dissipation (Wg2)≤ 8 W
Grid Voltage 1 (Ug1)≥ -100 V, 32 V typical
Grid Voltage 2 (Ug2)≤ 500 V, 400 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)1 pF
Heater to cathode voltage (Uk/f)≤ 200 V
Internal Resistance (Ri)24 kΩ
Item Diameter38 mm
Item Height115 mm
Plate Capacitance (ca)9 pF
Plate Current (Ia)50 mA
Plate Dissipation (Wa)≤ 25 W
Plate Voltage (Ua)≤ 800 V, 400 V typical
Transconductance (S)9.5 mA/V
T-6CA7-JJ-MQB - Apex Burned-In Matched Quad versionBody Height100 mm
Cathode Current (Ik)≤ 150 mA
Filament Current (If)1.5 A
Filament Voltage (Uf)6.3 V
Grid 2 dissipation (Wg2)≤ 8 W
Grid Voltage 1 (Ug1)≥ -100 V, 32 V typical
Grid Voltage 2 (Ug2)≤ 500 V, 400 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)1 pF
Heater to cathode voltage (Uk/f)≤ 200 V
Internal Resistance (Ri)24 kΩ
Item Diameter38 mm
Item Height115 mm
Plate Capacitance (ca)9 pF
Plate Current (Ia)50 mA
Plate Dissipation (Wa)≤ 25 W
Plate Voltage (Ua)≤ 800 V, 400 V typical
Transconductance (S)9.5 mA/V
T-6CA7-JJ - Single versionBody Height100 mm
Cathode Current (Ik)≤ 150 mA
Filament Current (If)1.5 A
Filament Voltage (Uf)6.3 V
Grid 2 dissipation (Wg2)≤ 8 W
Grid Voltage 1 (Ug1)≥ -100 V, 32 V typical
Grid Voltage 2 (Ug2)≤ 500 V, 400 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)1 pF
Heater to cathode voltage (Uk/f)≤ 200 V
Internal Resistance (Ri)24 kΩ
Item Diameter38 mm
Item Height115 mm
Plate Capacitance (ca)9 pF
Plate Current (Ia)50 mA
Plate Dissipation (Wa)≤ 25 W
Plate Voltage (Ua)≤ 800 V, 400 V typical
Transconductance (S)9.5 mA/V

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet497.92 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on December 16th, 2015.
JustinG
December 17th, 2015
Staff Member
Top Contributor
Please refer to the spec sheet on this page for the limiting values but this tube appears to have a limit of 800V

Product Reviews

5.00 out of 5 based on 5 reviews
- April 19th, 2021
5 out of 5

Shipped quickly and came in great condition. They also sound awesome!

- June 22nd, 2020
5 out of 5

These tubes work well in my Music Man HD130. No issues with bias or temperature. Very quiet at idle. No microphonics either.

- September 28th, 2019
5 out of 5

The 4 6CA7JJ-matched* now work in my AOIN stereo Class-A amplifier. Each tube has bias adjustment for even a better match. The *tubes are transparent and clear across the audio spectrum.

- October 14th, 2018
5 out of 5

The original order of"]2-matched pair of 6CA7-JJ. Both were defective with high grid and heater leakage. They both immediately began secondary-emissions similar to a flashlight brightness. I made very-quick tub-tester and voltage checks in and out of circuit to determine fat. Then called: tubesandmore.com for a replacement-matched pair.
The new replacements are very stable, with all-electrodes "dark" running properly (except the cathode normally-orange in color and heat.) THE SOUND is crisp/clear and now up-to full volume(!!) Wonderful. I ran the old Canadian-Made Bass-amp for a few hours-test--very stable and calm. The "Made in Germany" filter-capacitors(4) are extremely cool-running and has made the old-amp extremely quiet while idling w/o music.

- October 24th, 2016
5 out of 5

Switched my Sovtek bassov blues boy from the JJ 6l6's over to these(amp was modded for correct bias and heaters) and couldn't be more happy as in i'm never going back i can best describe these as very full range when compared to the 6l6 more mids equal to or better lows and the highs are crisp and chime like.

i play bass thru this amp and i don't play clean think sabbath/hendrix overdriven bass hope this helps out someone. and thanks to tubes and more/antique electric for offering such a great tube.

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.