# Vacuum Tube - 6L6GC STR, Tung-Sol Reissue

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Starting at: $40.10 In Stock Tung Sol 6L6GC “STR” beam-power tetrode tube. Made in Russia. The Tung-Sol legacy continues with the introduction of the new 6L6GC STR. The ultimate in musical tone and smooth overdrive, the STR delivers the sound that established Tung-Sol as the benchmark of quality. Built to the same “Special Tube Request” specs of leading amplifier manufacturers of the 1960s, the 6L6GC STR is a rugged and reliable power tube for use in the most demanding guitar ampliﬁer circuits. Matched versions of this tube use Apex Matching SKU: T-6L6GC-STR-T Item ID: 004741 Brand: Tung-Sol, Apex Matched Type: RoHS Compliant ### Accessory Items: Part Numbers Single or MatchedOur Part NumberUPC/EAN Apex Matched PairT-6L6GC-STR-TMP609722129558 Apex Matched QuadT-6L6GC-STR-TMQ609722129565 SingleT-6L6GC-STR-T609722129541  No measurements are currently available for this product. Please contact us if you have any questions.  Packaging Dimensions Apex Matched Pair version T-6L6GC-STR-TMP 4.5 in. × 4.3 in. × 2 in. Apex Matched Quad version T-6L6GC-STR-TMQ 4.5 in. × 4.3 in. × 4.3 in. Single version T-6L6GC-STR-T 4.75 in. × 1.5 in. × 1.75 in. Weight (Packaging) Apex Matched Pair version T-6L6GC-STR-TMP 0.24 lbs. Apex Matched Quad version T-6L6GC-STR-TMQ 0.48 lbs. Single version T-6L6GC-STR-T 0.12 lbs.  No measurements are currently available for this product. Please contact us if you have any questions.  Specification Sheet for Single T-6L6GC-STR-T ## My Project Lists ### You must be logged in to add items to a project list. ## Specifications, Files, and Documents Specification Sheet for Single (T-6L6GC-STR-T)423.73 KB ## Questions and Answers Click each question to see its answers. Asked by Anonymous on April 11th, 2016. April 12th, 2016 Staff Member Top Contributor If your amp uses 6L6 tubes for power these should be a great upgrade/replacement. August 29th, 2017 JustinG do You have any expierence wiht Bugera 333xl with this tubes ? I'm curently searching a set of 6l6 for this amp and I'm curious about the effect after swaping stock Bugera EL 34 on Tung-Sol 6l6 STR. Kamil August 29th, 2017 Staff Member The Tung-Sol 6L6's are a warm sounding tube and have a nice creamy overdrive tone. Asked by Anonymous on October 5th, 2017. October 5th, 2017 Staff Member This tube has a plate voltage of 500V. ## Product Reviews 4.64 out of 5 based on 14 reviews - June 4th, 2022 5 out of 5 With the shortages of tubes, & no American tubes being made anymore, I contacted a longtime electronics guru friend of mine to help me in my search for replacements for my Fender amps. He and I went through availability and quality of all and both agreed on these. I'm well pleased so far, and will be using them for sometime to come. Thx, Pat - January 27th, 2021 5 out of 5 Excellent service and products! - September 29th, 2020 5 out of 5 A very good and robust Modern built version of the 6L6GC power tube. I purchased a matched Quad set of these output tubes. They matched perfectly for transconductance on my Hicok and small variance within 1 or 2mA for idle current inside a fully serviced vintage BF Twin. The tubes are very robust and I was able to get approx 26 watts idle dissapation per tube with barely any perceptiable glow of the plates when played fairly hard while viewing with the lights of in a dark room. Increasing the bias and reducing the current the soft creamy harmonic rich tone remained mostly the same with static plate dissapation as low as approx 15 watts per tube before perception of tonal significant change with less of the creamy distortion present and the tone started to brighten up. I biased at around 19 watts which pushes the tube a bit on the harder side. I am skeptical how long the tone remains the same. But will update if any major reduction of tone occurs in the future after the amp has more than a few hours running hot like this. So far I like the consistent tone within a wide range of bias. Overall tone is decent and for most end users ears it is at least comparable enough to most average vintage tube. Certainly no worse than other modern tubes. Not sure if they are as tough as JJ and much noticeable sonic difference in comparison. The JJ sounds clear and sterile while the TungSol R.I. seems a bit more colorful contributes to shaping the tone in a pleasent way. So I like the tonal abilities of the tube. I like the visual robustful appearance of the inner construction and if you are very vain the Tung Sol labeling looks cool inside your vintage rig too.The price and availability of this tube is nearly equal to the JJ and overall this tube is a winner. I like it alot. I wonder how many brands are the same tube with different labeling? - August 2nd, 2020 5 out of 5 Great sounding tunes - purchased a matched pair and bias was right on the spot once compared with the test data that was provided. Would certainly buy again! - June 2nd, 2020 1 out of 5 Unfortunately, I am very disappointed with the quality of Tung Sol tubes. I Purchased a brand new out of the box Fender super reverb reissue. This amp sounded great out of the box. However, I wanted to change the valves to a better tube with more tone. I Purchased a complete new set of Tung sols. 12ax7s,12at7s,5751,6l6-strs. I also installed a solid state rectifier. I installed the new set when I received the tubes, set a proper bias, let the tubes burn in slightly and rechecked bias. the first thing i noticed is the 5751 was microphonice right out of the box. I tried it in a different amp since a tube can be microphonic in one amp and not another. Still,microphonic. I ended up throwing away a brand new$25 tube since it was defective. I reinstalled the factory GT12ax7. Unfortunately now with less than 10 hours of time on this amp I started to hear a rattle while I played, even at lower volumes. So I start to investigate and I found one of the 6L6-STRs had terrible filament rattle. I pulled the tube and tapped it with my finger and the rattle was very loud. Again, swapped it in a different amp and the rattle is still present. so once again. I will be throwing away a $25 dollar tube that was a matched pair I purchased for$50. Now I have to buy a new pair of 6L6s and a 12ax7 or 5751. So that's at least \$75 that I already spent. I don't know if it Tung sols quality or possibly the handling of the tube prior to shipping but this is a costly problem I hope will be fixed by using a different tube. I never contacted Antique Electronic Supply over this problem since tubes do not come with a warranty. Its unfortunately luck of the draw. They sound great if you get a good tube.

- August 21st, 2019
5 out of 5

I am very satisfied with Tung Sol 6L6GC STR's!

- March 23rd, 2019
5 out of 5

My recent order was delivered promptly. The matched pair of Tung-Sols was well packaged. I replaced the PS caps in my 90's era Carvin X60 and installed the new Tung-Sols.. Everything sounds great!

- March 12th, 2019
5 out of 5

I have been purchasing tubes from Antique Electronic Supply for years and have been 100% satisfied.

- August 13th, 2018
5 out of 5

great tubes, one of my favorites. your service was excellent. plus i love your sales. they help me alot. my best to you, paul b

- February 21st, 2017
5 out of 5

best sounding current production power tubes ever... they are all i recommend anymore. I will look forward to trying their pre-amp 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.