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Tubes for the Fender Blues Jr.

The Fender Blues Jr. amplifier requires the following components:

× 3
12AX7
12AX7
Vacuum Tube - 12AX7-A, Triode, Dual, High MU
Vacuum Tube - 12AX7 C, Groove Tubes
Vacuum Tube - 12AX7, China
Vacuum Tube - 12AX7/ECC83, Mullard, Made in Russia
Vacuum Tube - 12AX7, Tube Amp Doctor, Premium Selected
Vacuum Tube - 12AX7, Peavey
Vacuum Tube - 12AX7A-C5, Ruby Tubes
Vacuum Tube - 12AX7B, China
Vacuum Tube - 12AX7/ECC83, Electro-Harmonix
Vacuum Tube - 12AX7LPS, Sovtek
Vacuum Tube - 12AX7WA, Sovtek
Vacuum Tube - 12AX7WB, Sovtek
Vacuum Tube - 5751, Triode, Dual, HI-MU
Vacuum Tube - 5751, Sovtek
Vacuum Tube - 7025, Triode, Dual, High MU
Vacuum Tube - 5751, GE JAN, Dual Triode, HI-MU
Vacuum Tube - 7025-WA, Tube Amp Doctor, High-Grade, Premium Selected
Vacuum Tube - 5751, JJ Electronics
Vacuum Tube - 7025, China
Vacuum Tube - 12AX7S, JJ Electronics, Mid Gain
Vacuum Tube - 12AX7WC, Sovtek
Vacuum Tube - 5751, Tung-Sol
Vacuum Tube - 12AX7, Genalex Gold Lion, Standard
Vacuum Tube - 12AX7/B759, Genalex Gold Lion, Gold Pin
Vacuum Tube - 5751, Tube Amp Doctor, Premium Selected
Vacuum Tube - 7025 – Tube Amp Doctor, High Grade
Vacuum Tube - 12AX7A, China
Vacuum Tube - 12AX7, Tung-Sol - Regular
Vacuum Tube - 12AX7, Tung-Sol - Gold
Vacuum Tube - 12AX7/ECC83, JJ Electronics - Regular
Vacuum Tube - 12AX7/ECC83, JJ Electronics - Gold
Vacuum Tube - ECC803/12AX7, JJ Electronics, Long Plate - Regular
Vacuum Tube - ECC803/12AX7, JJ Electronics, Long Plate - Gold
Please make a selection above.
Miniature high-mu twin triode each section of which has an individual cathode connection - especially suited for use in resistance-coupled voltage amplifiers, phase inverters, multivibrators, and industrial-control circuits.

9 pin miniature preamp tube (Amplification Factor = 100). This is the ubiquitous Chinese 12AX7 with added selection. The gain is high and the American "Groove Tubes" must be filtering out the noisiest ones. Great chiming tone with sweet, warm midrange excellent for Marshall® and Fender® amps. Smooth distortion characteristics and one of the highest-output preamp tubes in the GT 12AX7 line, with very consistent quality

9 pin miniature preamp tube (Amplification Factor =100). This ubiquitous Chinese tube is straightforward and bright. Its high gain gives it some bite, too. In overdrive, it brings out the highs and offers easy access to harmonic sustain.

Russion-made Mullard Reissue 12AX7 dual triode. Large sound stage with excellent detail. Factory selected for low noise and microphonics. Great for hi-fi amps.

9 pin miniature preamp tube (Amplification Factor =100). This is the ubiquitous Chinese 12AX7 with premium selection. The gain is high and the German Tube Amp Doctor must be filtering out the noisiest ones. Premium selected by Tube Amp Doctor, this is a quiet Chinese 12AX7 with high gain that will bring a dull sounding amp back to life.

Peavey 'Super 7' 12AX7

9 pin miniature preamp tube (Amplification Factor = 100). This is the ubiquitous Chinese 12AX7 with added selection. The gain is high and the American "Ruby Tubes" must be filtering out the noisiest ones.

9 pin miniature preamp tube (Amplification Factor = 100). The Chinese 12AX7B is very similar in tone to its standard Chinese cousin, but the Bs seem to average in at slightly lower gain and noise.

This Russian tube is full bodied and bright with a more straightforward presentation. It packs a lot of bite with its higher-than-normal gain. In overdrive, it offers a lot of crunchy fizz. High gain preamplifier tube with ultra low noise and detailed, musical tone. Unique spiral filament eliminates filament to cathode induced hum common on amplifiers that use AC on the filaments.

9 pin miniature preamp tube (Amplification Factor = 100). This Russian tube is full bodied and well balanced. It has a high gain with a very smooth presentation. In overdrive, it is not quite as defined as the 12AX7-S-JJ, but it offers more crunchy fizz.

9 pin miniature preamp tube (Amplification Factor = 100). This Russian tube has strong lows and bright highs. Its lows demand attention when playing full bar chords. In overdrive, it offers a lot of crunchy fizz.

Sovtek 12AX7WB dual triode.
Miniature high-mu twin triode each section of which as an individual cathode connection suited for use in resistance-coupled voltage amplifiers, phase inverters, multivibrators, andindustrial-control circuits where high voltage gain is desired.
Sovtek 5751 dual triode.
Miniature, high-mu, twin triode primarily designed for use in low-level stages of high-gain audio-frequency amplifiers. Use of the 7025 in this application is advantageous because of its low hum output.
Miniature high-mu twin triode each section of which as an individual cathode connection suited for use in resistance-coupled voltage amplifiers, phase inverters, multivibrators, and industrial-control circuits where high voltage gain is desired.

The TAD 7025 WA delivers full gain with smooth top end. No microphonic issues even with the most sensitive preamps. The 7025 WA supports a fat midrange and creates a bold tone with lots of overtones. Played clean the TAD 7025 WA delivers a warm liquid tone which is very responsive to dynamic playing. Overdriven the 7025 WA provides lots of sustain with well defined mid-range punch.

A dual triode that can be used in place of most 12AX7 circuits. The rugged build of this tube and reduced gain (30% less than a 12AX7) can improve headroom and give better control in high gain stages allowing users to more easily dial in sweet spots. The JJ 5751 features a smooth and balanced tone and a detailed response with low noise and low microphonics.

7025 - 9 pin miniature preamp tube Made in China Lower hum/noise version of a 12AX7/ECC83 Voltage gain rating: 1 2 3 4 5 6 7 8 9 10 Lows Mids Highs

A new take on the classic 12AX7 preamp tube. While it uses the same rugged build and thick glass as other JJ preamp tubes, this tube differs in construction from the typical 12AX7 in that it features a medium-long plate, which provides a dynamic and open sound with a rich forward sounding mid range. This tube offers low noise and low microphonics.

Sovtek 12AX7WC dual triode preamp tube. Made in Russia.
Tung Sol 5751 dual triode preamp tube. Made in Russia. NOS specs call the 5751 a “special 12AX7” having a high-mu amplification factor of 70.

Genalex Gold Lion ECC83 (12AX7) dual triode preamp tube with standard pins. Made in China. The Genalex Gold Lion 12AX7/ECC83 Standard Pins is a low cost alternative to the Genalex Gold Lion B759/12AX7 Gold Pins. This tube has a short plate format for reduced microphonics and has been put through a special selection process to ensure low noise and good balance of gain between the two triode sections. Get Genalex Gold Lion quality at almost half the cost.

Genalex Gold Lion ECC83/B759 (12AX7) dual triode preamp tube with gold pins. Made in Russia. 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.

5751 TAD Premium Selected Low-noise Tube for Best Clean Tone! The TAD Selected 5751 is our first choice for noticeably improved clarity, smoothness, and a true vintage tone character for most guitar amps! There will still be plenty of gain - so if you own a high-gain preamp that does not have these classic crunch characteristics, the 5751 tube will work wonders. In hi-fi preamps and CD players, the TAD selected 5751 will lower the noise floor and sound smoother and clearer than many 12AX7 tubes. Especially this low-noise tube is recommended for best clean tone with big bottom, warm midrange and silky top end. Performs great for HiFi too! Replaces any 12AX7A/WA, ECC83, 7025 etc. NOTE: SRV used a 5751 to improve his clean tone with vintage Fender amps producing that thick and three-dimensional bold tone.

7025 HIGHGRADE TAD Premium Selected Warm, clean tone with creamy overdrive! PREMIUM selected quality for the most demanding amp stages. This tube works greatly for warm clean tones and creamy overdrive. We recommend this tube for the 1st gain stage and as input tube. It upgrades 12AX7A and ECC83 tubes and replaces E83CC tubes. The HIGHGRADE Selection is the tip-of-the-top quality at the lowest noise (microphony, hum, hiss) level. Tipically only 0,5-2% out of the whole production of this tube meet the HIGHGRADE requirements. NOTE: due to extreme demanding TAD-Selection criteria, the availability of this tube is limited. Please check the information about availability. The TAD 7025 Highgrade can replace any ECC83, E83CC, 12AX7, 12AX7A, 12AX7M, 12AX7WA/WB/WC/LPS/EH, 5751 or 7025. In case this tube is currently not available, we recommend as replacement tube: RT080

9 pin miniature preamp tube (Amplification Factor =100). This is the Chinese 12AX7A. The 12AX7A is a lower noise version of the 12AX7.

Russian made reissue of the original Tungsol. The Ultimate 12AX7. Big, warm, and musical. High Gain, ultra-low microphonics, and superb linearity with a dynamic 3-D sound. Available with gold pins.

Russian made reissue of the original Tungsol. The Ultimate 12AX7. Big, warm, and musical. High Gain, ultra-low microphonics, and superb linearity with a dynamic 3-D sound. Available with gold pins.

The JJ Electronic 12AX7 / ECC83 has quickly become a modern classic in preamp tubes. Its rugged design and rich harmonics make this tube an obvious choice for musicians who need a reliable and high quality tube at a reasonable price. The balanced tone of the JJ 12AX7 works well in any amp.

The JJ Electronic 12AX7 / ECC83 has quickly become a modern classic in preamp tubes. Its rugged design and rich harmonics make this tube an obvious choice for musicians who need a reliable and high quality tube at a reasonable price. The balanced tone of the JJ 12AX7 works well in any amp.

A high performance, long plate version of the ECC83 / 12AX7. Like all JJ preamp tubes, these are built into a rugged package using the spiral filament and robust plate structure resulting in low microphonics and high reliability. The long plate version of this tube differs from the standard version with its stronger and fuller sound. This tube will work in any 12AX7 or ECC83 position.

A high performance, long plate version of the ECC83 / 12AX7. Like all JJ preamp tubes, these are built into a rugged package using the spiral filament and robust plate structure resulting in low microphonics and high reliability. The long plate version of this tube differs from the standard version with its stronger and fuller sound. This tube will work in any 12AX7 or ECC83 position.

$53.96 × 3
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$9.85 × 3
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$12.55 × 3
$22.46 × 3
× 2
EL84
EL84
Vacuum Tube - EL84, Electro-Harmonix
Vacuum Tube - EL84, JJ Electronics
Vacuum Tube - EL84, Mullard Reissue, Made in Russia
Vacuum Tube - EL84, Sovtek
Vacuum Tube - EL84, Valve Art, Single
Vacuum Tube - EL84, Peavey, Matched Pair
Vacuum Tube - EL84, Groove Tubes, Matched Pair
Vacuum Tube - EL844, JJ Electronics
Vacuum Tube - EL84/6BQ5, Tung-Sol
Vacuum Tube - EL84/N709, Genalex Gold Lion
Vacuum Tube - EL84, Tube Amp Doctor - Single
Vacuum Tube - EL84, Tube Amp Doctor - Matched Pair
Vacuum Tube - EL84/N709, Genalex Gold Lion - Matched Pair
Vacuum Tube - EL84, JJ Electronics - Apex Matched Pair
Vacuum Tube - EL844, JJ Electronics - Apex Matched Pair
Vacuum Tube - EL84, Sovtek - Apex Matched Pair
Vacuum Tube - EL84, Mullard Reissue, Made in Russia - Apex Matched Pair
Vacuum Tube - EL84, Electro-Harmonix - Apex Matched Pair
Vacuum Tube - EL84/6BQ5, Tung-Sol - Apex Matched Pair
Please make a selection above.

Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87” *

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

The JJ Electronic EL84 is a solidly built EL84 / 6BQ5 with excellent tonal qualities. JJ’s rugged construction of this tube offers high reliability without any compromise to the sound. This tube has solid lows with warm bright mids and shimmery highs. When saturated the harmonics are rich and dynamic. The JJ EL84 nails the classic sound of this tube. This tube can replace any EL84 or 6BQ5 tube.

Russian made Mullard reissue EL84. Copy of the original. Black plates, carbonized screens, and gold plated grids. This tube was the "Voice of the Vox AC-30." A mainstay of affordable quality hi-fi amplifiers of the 1960s. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

The Sovtek EL84 series produce an unbeatable smooth, warm, distortion. Excellent replacements in vintage VOX AC-30s and the like. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

A great, economical EL84. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.86”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

Peavey EL84 Matched Pair

Groove Tube's Gold Series EL84. The warmest Groove Tube in this family. It remains very buttery, with relatively high power output and very even response. A great replacement for many modern stock amps, overcoming a variety of design issues and limitations in inexpensive tube amps.

The JJ Electronic EL844 is a variation on the classic tube which reduces the overall headroom by 25%. With the reduced power, hitting that rich distortion that the EL84 is notorious for is more manageable. This tube will hit full saturated power tube sounds without having to crank the amps volume as high which makes them a great choice for recording as well as home / bedroom use.

Due to many requests by fans, the Tung-Sol EL84/6BQ5 has been reissued. The Tung-Sol EL84 / 6BQ5 was a popular OEM tube for American-made EL84 / 6BQ5 guitar amplifiers, such as those built by Gibson and Harmony. Due to its rugged construction and conservative ratings, it is the most reliable current production EL84 type available for use in Vox AC-30 type amplifiers. In addition, its linearity and tone characteristic make it the ideal replacement for EL84 hi-fi amplifiers, such as those built by Fisher, Scott, and Harmon-Kardon. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

Genalex Gold Lion N709 / EL84 power pentode tube. Made in Russia. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

What sets the TAD EL84 apart from other tubes is its heavy duty construction, featuring a thick glass envelope as well as premium cathode and plate materials and gold grid wire. This is a great replacement for any EL84 based amplifier. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

What sets the TAD EL84 apart from other tubes is its heavy duty construction, featuring a thick glass envelope as well as premium cathode and plate materials and gold grid wire. This is a great replacement for any EL84 based amplifier. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

Genalex Gold Lion N709 / EL84 power pentode tube. Made in Russia. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

The JJ Electronic EL84 is a solidly built EL84 / 6BQ5 with excellent tonal qualities. JJ’s rugged construction of this tube offers high reliability without any compromise to the sound. This tube has solid lows with warm bright mids and shimmery highs. When saturated the harmonics are rich and dynamic. The JJ EL84 nails the classic sound of this tube. This tube can replace any EL84 or 6BQ5 tube.

The JJ Electronic EL844 is a variation on the classic tube which reduces the overall headroom by 25%. With the reduced power, hitting that rich distortion that the EL84 is notorious for is more manageable. This tube will hit full saturated power tube sounds without having to crank the amps volume as high which makes them a great choice for recording as well as home / bedroom use.

The Sovtek EL84 series produce an unbeatable smooth, warm, distortion. Excellent replacements in vintage VOX AC-30s and the like. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

Russian made Mullard reissue EL84. Copy of the original. Black plates, carbonized screens, and gold plated grids. This tube was the "Voice of the Vox AC-30." A mainstay of affordable quality hi-fi amplifiers of the 1960s. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87” *

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

Due to many requests by fans, the Tung-Sol EL84/6BQ5 has been reissued. The Tung-Sol EL84 / 6BQ5 was a popular OEM tube for American-made EL84 / 6BQ5 guitar amplifiers, such as those built by Gibson and Harmony. Due to its rugged construction and conservative ratings, it is the most reliable current production EL84 type available for use in Vox AC-30 type amplifiers. In addition, its linearity and tone characteristic make it the ideal replacement for EL84 hi-fi amplifiers, such as those built by Fisher, Scott, and Harmon-Kardon. Tube measurements are as follows:

  • Height: 2.75” (without pins)*
  • Diameter: 0.87”*

*Note: Due to the method of production in regards to the glass, measurements may vary slightly.

$10.35 × 2
$9.23 × 2
$13.95 × 2
$9.86 × 2
$6.75 × 2
$26.96 × 1
$39.60 × 1
$11.25 × 2
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$36.41 × 1
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$28.80 × 1
Total price for all components:
$0.00
Currently selected components:
12AX7:Not selected
EL84:Not selected