# Vacuum Tube - 12AX7 / B759, Genalex Gold Lion

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# Vacuum Tube - 12AX7 / B759, Genalex Gold Lion

Starting at: $28.10 In Stock Genalex Gold Lion ECC83/B759 (12AX7) dual triode preamp tube with gold pins. Original Genalex Gold Lion ECC83/B759 tubes are considered among the best 12AX7 types ever made. They are hard to find and when they are available, they are expensive. They exhibit a large detailed soundstage that is sought after by discerning audiophiles who demand the highest quality sound. The reissue Genalex Gold Lion ECC83/B759 recreates the sound signature of the original. This tube features balanced sections and gold plated pins. SKU: T-12AX7-X-GEN Item ID: 039540 Brand: Genalex Type: ### Accessory Items: Part Numbers Pin TypeOur Part NumberUPC/EAN RegularT-12AX7-GEN GoldT-12AX7-GOLD-GEN841358101779  Amplification Factor 85 - 115 Capacitance, Cathode to Heater 5.0 pF Capacitance, Plate to Plate 0.6 pF Capacitance, input 1.6 pF Capacitance, output 0.46 pF Cathode to Heater Voltage 200 V Grid Circuit Resistance (Rg), Automatic Bias 2.2 MΩ Grid Circuit Resistance (Rg), Fixed Bias 1.2 MΩ Grid Reverse Current 0.2 μA Heater Current 135 mA - 275 mA Heater Voltage 6.0 - 6.6 V / 12.0 - 13.2 V Plate Current (Ia) 9 mA Plate Dissipation, per triode (Wa) 1.2 W Plate Voltage (Ua) 330 V Structure-borne Noise 3.5 mv Transconductance (S) ≥ 1.4 mA/V  Packaging Dimensions 2.75 in. × 1 in. × 1 in. Weight (Packaging) Gold version T-12AX7-GOLD-GEN 0.036 lbs. Regular version T-12AX7-GEN 0.034 lbs.  T-12AX7-GEN - Regular version Amplification Factor 85 - 115 Capacitance, Cathode to Heater 5.0 pF Capacitance, Plate to Plate 0.6 pF Capacitance, input 1.6 pF Capacitance, output 0.46 pF Cathode to Heater Voltage 200 V Grid Circuit Resistance (Rg), Automatic Bias 2.2 MΩ Grid Circuit Resistance (Rg), Fixed Bias 1.2 MΩ Grid Reverse Current 0.2 μA Heater Current 135 mA - 275 mA Heater Voltage 6.0 - 6.6 V / 12.0 - 13.2 V Plate Current (Ia) 9 mA Plate Dissipation, per triode (Wa) 1.2 W Plate Voltage (Ua) 330 V Structure-borne Noise 3.5 mv Transconductance (S) ≥ 1.4 mA/V T-12AX7-GOLD-GEN - Gold version Amplification Factor 85 - 115 Capacitance, Cathode to Heater 5.0 pF Capacitance, Plate to Plate 0.6 pF Capacitance, input 1.6 pF Capacitance, output 0.46 pF Cathode to Heater Voltage 200 V Grid Circuit Resistance (Rg), Automatic Bias 2.2 MΩ Grid Circuit Resistance (Rg), Fixed Bias 1.2 MΩ Grid Reverse Current 0.2 μA Heater Current 135 mA - 275 mA Heater Voltage 6.0 - 6.6 V / 12.0 - 13.2 V Plate Current (Ia) 9 mA Plate Dissipation, per triode (Wa) 1.2 W Plate Voltage (Ua) 330 V Structure-borne Noise 3.5 mv Transconductance (S) ≥ 1.4 mA/V  Specification Sheet All Models ## My Project Lists ### You must be logged in to add items to a project list. ## Specifications, Files, and Documents Specification Sheet 1.25 MB ## Questions and Answers Click each question to see its answers. Asked by Anonymous on April 24th, 2020. April 24th, 2020 Staff Member The gold plating on the tube pins as well as the country of origin among others. March 20th, 2021 The plates are longer in the gold version, as well as many other small differences. Please see the photos to compare. April 19th, 2022 I have questions the gold pin or regular pin is good in vocals ? Asked by Anonymous on October 6th, 2016. October 7th, 2016 Yes, this tube is comparable will all other 12AX7's and their variants. Asked by Anonymous on October 7th, 2016. October 7th, 2016 These tubes do have balanced triodes but we can not match them to each other. You can call us directly at 480-820-5411 and we can get a quote for a bulk discount. Asked by Anonymous on April 13th, 2018. April 13th, 2018 This is a very high gain preamp tube and if that is what you are going for then this is an excellent choice. Asked by Anonymous on May 23rd, 2018. May 23rd, 2018 If your amp calls for a 12AX7 and you are looking for a tube with a lot of gain then this would be an excellent choice. Check out our 12AX7 comparisons here: https://www.amplifiedparts.com/tech-corner/12ax7-comparison-current-made-tubes Asked by Anonymous on June 5th, 2018. June 8th, 2018 Staff Member Tube choices are highly subjective and have many variables (What type of guitar being used, the genre of music, your personal playing habits, etc) so we encourage you to check out our comparisons of 12AX7s and 6L6 tubes. https://www.amplifiedparts.com/tech-corner/12ax7-comparison-current-made-tubes https://www.amplifiedparts.com/tech-corner/6l6gc-comparison-current-made-tubes Asked by Anonymous on August 21st, 2018. August 22nd, 2018 Staff Member Tube choices are highly subjective and have many variables (What type of guitar being used, the genre of music, your personal playing habits, etc) so we encourage you to check out our comparisons of 12AX7s and 6L6 tubes. https://www.amplifiedparts.com/tech-corner/12ax7-comparison-current-made-tubes Asked by Anonymous on September 12th, 2018. September 12th, 2018 Staff Member Since both of your amps call for a 12AX7, it will certainly work. If you are looking for a tube that can produce a lot of gain then this would be an excellent choice. Check out our 12AX7 comparisons here: https://www.tubesandmore.com/tech-corner/12ax7-comparison-current-made-tubes Asked by Anonymous on April 10th, 2019. April 10th, 2019 Staff Member If the Saturn Signature uses 12AX7 tubes, these will work as replacements. Asked by Anonymous on May 27th, 2019. May 30th, 2019 Staff Member This would certainly work in any preamp position on your amplifier. Please see the 12AX7 Comparison of Current Made Tubes chart for the tonal characteristics of this particular tube. https://www.amplifiedparts.com/tech-corner/12ax7-comparison-current-made-tubes Asked by Anonymous on August 4th, 2019. August 6th, 2019 Staff Member Yes, these can be used in place of any 12AX7 tube. Asked by Anonymous on November 25th, 2019. November 26th, 2019 Staff Member This is a standard sized 12AX7 tube and will fit any 12AX7 position. Asked by Anonymous on April 29th, 2020. April 30th, 2020 Staff Member The answer to that is subjective in nature and our picks may not be your favorite. With this in mind, we developed the 12AX7 Comparison of Current Made Tubes chart to help navigate the different options from the many available. https://www.amplifiedparts.com/tech-corner/12ax7-comparison-current-made-tubes Asked by Anonymous on January 21st, 2023. January 23rd, 2023 Staff Member The gold pin version is made in Russia while the standard pin option is made in China. Both options are available in this listing. ## Product Reviews 4.38 out of 5 based on 8 reviews - May 12th, 2022 4 out of 5 I hear people rave about this tube to be as good as NOS euro tubes. They do sound great but they seem to be more modern sounding and just balls out all the time. No subtlety and less range. - April 18th, 2022 5 out of 5 Excellent product, made my amp sound superb. Just ordered a few power tubes because I was so happy with Amplified Parts, even got an email from sales rep thanking me for my purchase!! Awesome !!!! - March 5th, 2022 5 out of 5 I have a Bugera V5 Infinium practice amp for six years. The tubes needed to be replaced. I bought the Genalex Gold Lion 12AX7 and the Mullard EL84 reissue. I'm not going to say it sounds like a new amp but the sound definitely improved. The original tubes had a ringing, sort of hollow, empty sound. This tube combination has a rich, more focused sound that is much better suited for the wind synths I play. I just re-ordered a spare set. The price of the set increased seven dollars total already, what with all putin's insanity in Ukraine and all the sanctions. Stock up. ;) - December 10th, 2020 3 out of 5 I compared several 12AX7 tubes. I found this tube to be a bit too bright and with a bit too much drive. I preferred the Mullard CV4004. I thought the Mullard had better definition than the Gold Lion. I did not get gold pins. I was surprised to see that this tube is now made in China. - December 10th, 2020 3 out of 5 I compared several 12AX7 tubes. I found this tube to be a bit too bright and with a bit too much drive.I preferred the Mullard CV4004. I thought the Mullard had better definition than the Gold Lion. - October 2nd, 2020 5 out of 5 I replaced the factory pair of 12ax7s in my Pro-ject Tube Box DS2 with a pair of these darlings. I'd been told the phonostage was not good enough to be worth tube rolling. BOLLOCKS.System is a Rega RP-8 with Apheta 3, into a Pro-ject Tube Box DS2. Then a Vincent sa-31 pre-amp into a Parasound A-23 solid state power amp. That drive a pair of B&W 706S2s. The first few minutes these tubes were muddy and noisy. Within a album they had already gotten full and even. Within a day the sound was far beyond the previous set of tubes. I was able to lower the gain on my phonostage by 5dB, from 65 to 60, and still use less volume on my pre-amp and power amp to drive my speakers. This made quite a nice difference in dropping noise floor. As this is my first effort at tube rolling I'm surprised and very pleased with the out come. I'm absolutely pleased with the$93 investment and the resultant improvements in my audio system..I also want to thank Amplified Parts for their tube comparison reviews. I used them to select what tubes to get. Using the low, mid and high ratings as well as the power output numbers to figure out what seemed like the best bet for the change I was wanting to get out of the exercise.

- January 16th, 2020
5 out of 5

I like it. It has a bit of personality around the edges and a good amount of gain. Makes my strat sound stratty. I'm not audiophile enough to quantify it more than that and it all comes with a grain of salt.

I'm using it in a homemade Fender Champ type circuit with a 6L6 power tube. I like this tube better than the other preamp tubes I have tried in this amp : JJ (bright and brittle), EH (round and maybe dull - but I love them in my Vox) and Mullard (nice clean, not overly harmonic).

Note that the desc says Made in Russia, but the tube is stamped Made in China. This is the standard pin tube.

- May 28th, 2017
5 out of 5

I just love these tubes !!!
These are some of the best tubes out there today.. The natural sustain that comes out of these tubes is unbelievable... I put these in my 100 watt Plexi and the sound is in a word AWESOME ! I ordered more for my 50 watt Plexi. They are pricy, But you get what you pay for. I will stock up on these tubes.