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Pictured: Single
Pictured: Apex Matched Pair
Pictured: Apex Matched Quad
Pictured: Apex Matched Sextet
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Vacuum Tube - 6L6GC, JJ Electronics
The JJ Electronic 6L6GC is the classic pentode built with the rugged construction that only JJ could deliver. At 30W, this tube delivers plenty of headroom. The highs are clear and responsive with warm mids and tight solid lows. Known for their reliability and articulation, the JJ 6L6GC is a great option for guitar amplifiers and Hi-Fi stereo equipment.
Matched versions of this tube use Apex Matching
Choose burned-in tubes for maximum stability and performance.
RoHS Compliant
| Single or Matched | Our Part Number | UPC/EAN |
|---|---|---|
| Single | T-6L6GC-JJ | 609722122788 |
| Apex Matched Pair | T-6L6GC-JJ-MP | 609722122795 |
| Apex Matched Quad | T-6L6GC-JJ-MQ | 609722122801 |
| Apex Burned-In Matched Pair | T-6L6GC-JJ-MPB | 609722122818 |
| Apex Matched Sextet | T-6L6GC-JJ-MS | 609722157476 |
| Apex Burned-In Matched Quad | T-6L6GC-JJ-MQB | 609722122825 |
| Apex Burned-In Matched Sextet | T-6L6GC-JJ-MSB |
| Body Height | 100 mm | |
| Filament Current (If) | 0.9 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Grid Current 2, single tube (Ig2) | 5 mA | |
| Grid Voltage 1, push-pull (Ug1) | -17.5 V typical | |
| Grid Voltage 1, single tube (Ug1) | -14 V typical | |
| Grid Voltage 2, push-pull (Ug2) | ≤ 450 V, 270 V typical | |
| Grid Voltage 2, single tube (Ug2) | ≤ 450 V, 250 V typical | |
| Grid capacitance (cg1) | 12.5 pF | |
| Grid current 2, push-pull (Ig2) | 11 mA | |
| Grid to Plate Capacitance (ca/g) | 1.5 pF | |
| Item Diameter | 38 mm | |
| Item Height | 115 mm | |
| Plate Capacitance (ca) | 10 pF | |
| Plate Current, push-pull (Ia) | 134 mA | |
| Plate Current, single tube (Ia) | 72 mA | |
| Plate Dissipation (Wa) | ≤ 30 W | |
| Plate Voltage, push-pull (Ua) | ≤ 450 V, 270 V typical | |
| Plate Voltage, single tube (Ua) | ≤ 450 V, 250 V typical |
| Packaging Dimensions | Apex Burned-In Matched Pair version | 4.6 in. × 3.3 in. × 1.6 in. |
| Apex Burned-In Matched Quad version | 4.6 in. × 3.3 in. × 3.3 in. | |
| Apex Burned-In Matched Sextet version | 4.6 in. × 3.3 in. × 1.6 in. | |
| Apex Matched Pair version | 1.8 in. × 3.3 in. × 4.6 in. | |
| Apex Matched Quad version | 3.3 in. × 3.3 in. × 4.6 in. | |
| Apex Matched Sextet version | 3.25 in. × 4.25 in. × 4.75 in. | |
| Single version | 1.6 in. × 1.6 in. × 4.6 in. | |
| Weight (Packaging) | Apex Burned-In Matched Pair version | 0.29 lbs. |
| Apex Burned-In Matched Quad version | 0.58 lbs. | |
| Apex Burned-In Matched Sextet version | 0.87 lbs. | |
| Apex Matched Pair version | 0.29 lbs. | |
| Apex Matched Quad version | 0.58 lbs. | |
| Apex Matched Sextet version | 0.87 lbs. | |
| Single version | 0.145 lbs. |
 Specification Sheet | All Models |
My Project Lists
Specifications, Files, and Documents
Questions and Answers
Click each question to see its answers.
3 answers
Will I have to rebias my Mesa Boogie Dual Rectifier 100 watt amp head, and how well do these work in this amp head.
Asked by Anonymous on November 11th, 2016.
According to Mesa Boogie, if you order these tubes with "middle values" you should not have to rebias your amp.
Will I have to rebias my EVH 5150 III Amp if I put these in.
If your EVH has a bias pot we recommend re-biasing your amp.
3 answers
You can request plate current (PC) ratings at low, medium, or high where high equates to high headroom. Simply put a note on your order or give us a call and we will accommodate your request.
Asked by Anonymous on May 28th, 2017.
You can request plate current (PC) ratings of low, medium, or high where high equates to high headroom. Simply put a note on your order or give us a call and we can accommodate your request.
Hello Good People, This is Dave. I have four JJ 6L6GC's with a sku #T-6L6GC-JJ-MQ They were given as a gift bought thru amazon, And am happy with them! My question is, on all four tube boxes a label was marked 17/2.5 Could you tell me what this means? The values? Thank you in advance,I would really appreciate it! I will look to "Amplifiedparts" for future tube/electronics needs. Best Regards, Dave
The number will mean different things depending on how it is written. You will either see a printed Apex sticker or a sticker with a handwritten number. Please contact us at: info@amplifiedparts.com for more information.
1 answers
Can I use these in a Fender 75?
Asked by Anonymous on June 26th, 2016.
It appears that the Fender 75 uses 6L6's.
1 answers
Hi, I had 1 jj 6l6 bust when i shipped my amp . so I took another tube out to make it even 1 on each side . can i buy just one? without a bias?
Asked by Anonymous on January 19th, 2017.
Power tubes need to be matched in order for your amp to operate properly. If you ordered your tubes from us, we can get you one tube to match your existing power tubes.
1 answers
If I need two tubes, do I need to purchase two single ones or Apex Matched Pair? Because prices vary.
Asked by Anonymous on January 19th, 2017.
If you require two power tubes in a push pull configuration then you would want to purchase a matched pair.
1 answers
Do you have tube complement for fender twin reverb ?
Asked by Anonymous on January 19th, 2017.
Yes, we do have a complement for the Twin Reverb and you can find it by searching this part number on our site. SET-FENDER-123
1 answers
Will I have to rebias a 2002 59' Fender Bassman Reissue if I install a pair of these 6L6s?
Asked by Anonymous on August 10th, 2017.
With any retube, you may need to make adjustments to your amp depending on the type of bias it has. Your amp will either be fixed adjustable bias (has bias pot on the back of the amp) , Fixed non-adjustable bias (bias is fixed by a resistor in your amp), or cathode bias (self biasing no bias required). The manual for your amp should be able to tell you what type of bias you have. Rebiasing an amp is something that should be done by an experienced tech. Many amp manufactures setup their amps to accept "middle values" for tubes. You can request middle numbers when ordering. Keep in mind, this will not guarantee you will not have to rebias your amp.
1 answers
Can I select a hard or late distortion rating on the jj 6l6gc tubes?
Asked by Anonymous on November 28th, 2017.
Yes you will want to request "high numbers" in the notes section of the checkout process.
1 answers
Can i use this tube in an old 1948 Rock-Ola Jukebox amplifier? The tubes im looking for are 6L6G E7M.
Asked by Anonymous on February 4th, 2019.
February 4th, 2019
Staff Member
This will safely work in place of any 6L6G tube.
1 answers
I asked this about the Chinese tubes, how are these for a mesa bass amp that uses 3 pair of 6L6's? I bought the TADs before, bass was muddy.
Asked by ubernamen on March 8th, 2019.
March 8th, 2019
Staff Member
Please refer to our 6L6 comparison of current made tubes chart for information on these tubes: https://www.amplifiedparts.com/tech-corner/6l6gc-comparison-current-made-tubes
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.
Product Reviews
I bought these as replacements for a Fender Hot Rod DeVille 2x12, and they’re fantastic! They highlight a broad range of sound and seem to enhance the low end compared to the original tubes I had.
I bought a Fender Hot Rod Deluxe used and decided to swap out all the stock tubes for JJs. To my ears the JJs are a bit warmer than the stock Fender tubes which come in the amp. Also, Amplified Parts have the best prices I found online for tubes. Shipping was fast and the tubes arrived securely packaged. Thanks, Amplified Parts!
I have tried GT, EHX, RUBY and many other tubes, and the JJ's sound amazing, and for the price, it's the best option, I mean for me, for my ear, this sound amazing!!! Greetings from México! AMPLIFIEDPARTS YOU KICK ASS!!! THANKS!
It is a reliable, stable power vacuum tube.
I am experimenting with various power vacuum tubes,
Slovakia made is stable.
We recommend all means.
Amplified parts is the place to go when you need replacement tubes! Great prices.
This matched pair solved all the issues I was having and improved the tone for the better.
Much better!
Great sounding tubes and well-matched. However, the gain is on the low end so I had to increase my bias adjustment to maximum in order to get close to the recommended 70% of maximum power output from the power tubes.
I installed a matched pair of JJ 6L6 GCs in my 1963 Lafayette guitar amp. They produce great sound on both highs and lows.
Put a pair of these in a hot rod deluxe III. Very open sounding with controlled bass, mids are super and nice high end without super piercing highs. Really gave this amp some balls.
From my experience with the JJ 6L6GC,the short review at the top of this tubes' page is spot on.If you like dirt (and who dosent) This might be the best new tube you can get for it.