Vacuum Tube - 12AX7 / ECC83, JJ Electronics

Vacuum Tube - 12AX7 / ECC83, JJ Electronics

JJ Electronics
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Pictured: Gold
Pictured: Regular
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Pictured: Gold
Pictured: Regular
Pictured: Regular
Customer image:<br/>""
Customer image:<br/>"Station of WB7AM"
Customer image:<br/>"12AX7 JJ MIC PREAMP"
Customer image:<br/>"MIC PREAMP BROOKLIN 810"
Customer image:<br/>"JJ 12AX7 PREAMP UNDER CHASSIS"
Customer image:<br/>"100% JJ Tubes. Great Sound."
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Customer Images:
Customer image: ""Customer image: "Station of WB7AM"Customer image: "12AX7 JJ MIC PREAMP"Customer image: "MIC PREAMP BROOKLIN 810"Customer image: "JJ 12AX7 PREAMP UNDER CHASSIS"Customer image: "100% JJ Tubes. Great Sound."
Starting at: $12.95
In Stock

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. This versatile tube sounds excellent in clean amps offering an amazing dynamic response while also proving itself in high gain amps with its low noise and noticeably less microphonic issues than other tubes. The warm highs and transparent lows make it a great choice for any position in a tube amp. The JJ 12AX7 is the go-to tube of many amp builders and touring musicians.

SKU:
T-12AX7-JJ-X
Item ID:
004452
Brand:
JJ Electronics
RoHS Compliant
Part Numbers
Pin TypeOur Part NumberUPC/EANJJ Electronics Part Number
GoldT-12AX7-GOLD-JJ797734820959 ECC83S / 12AX7, 7025 - GOLD
RegularT-12AX7-S-JJ844632022081 ECC83S - 12AX7, 7025
Product Measurements by Type
Body Height49.2 mm
Cathode Current (Ik)≤ 8 mA
Filament Current (If)300 / 150 mA
Filament Voltage (Uf)6.3 / 12.6 V
Gain (μ)100
Grid Circuit Resistance (Rg)2.2 MΩ
Grid Voltage (Ug)≥ -50 V, -2 V typical
Heater to cathode resistance (Rk/f)150 kΩ
Heater to cathode voltage (Uk/f)≤ 180 V
Internal Resistance (Ri)62.5 kΩ
Item Diameter22 mm
Item Height56.3 mm
Plate Current (Ia)1.2 mA
Plate Dissipation (Wa)≤ 1 W
Plate Voltage (Ua)≤ 300 V, 250 V typical
Transconductance (S)1.6 mA/V
Packaging Information
Packaging Dimensions1 in. × 1 in. × 2.5 in.
Weight (Packaging)0.032 lbs.
Product Measurements by Item
T-12AX7-S-JJ - Regular versionBody Height49.2 mm
Cathode Current (Ik)≤ 8 mA
Filament Current (If)300 / 150 mA
Filament Voltage (Uf)6.3 / 12.6 V
Gain (μ)100
Grid Circuit Resistance (Rg)2.2 MΩ
Grid Voltage (Ug)≥ -50 V, -2 V typical
Heater to cathode resistance (Rk/f)150 kΩ
Heater to cathode voltage (Uk/f)≤ 180 V
Internal Resistance (Ri)62.5 kΩ
Item Diameter22 mm
Item Height56.3 mm
Plate Current (Ia)1.2 mA
Plate Dissipation (Wa)≤ 1 W
Plate Voltage (Ua)≤ 300 V, 250 V typical
Transconductance (S)1.6 mA/V
T-12AX7-GOLD-JJ - Gold versionBody Height49.2 mm
Cathode Current (Ik)≤ 8 mA
Filament Current (If)300 / 150 mA
Filament Voltage (Uf)6.3 / 12.6 V
Gain (μ)100
Grid Circuit Resistance (Rg)2.2 MΩ
Grid Voltage (Ug)≥ -50 V, -2 V typical
Heater to cathode resistance (Rk/f)150 kΩ
Heater to cathode voltage (Uk/f)≤ 180 V
Internal Resistance (Ri)62.5 kΩ
Item Diameter22 mm
Item Height56.3 mm
Plate Current (Ia)1.2 mA
Plate Dissipation (Wa)≤ 1 W
Plate Voltage (Ua)≤ 300 V, 250 V typical
Transconductance (S)1.6 mA/V

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Questions and Answers

Click each question to see its answers.
Asked by Anonymous on August 30th, 2015.
JustinG
August 31st, 2015
Staff Member
Top Contributor
Yes,this tube will be compatible with amps that use a 12AX7 in the preamp section such as the Fender Twin.
Asked by Anonymous on July 6th, 2016.
Matt H.
July 6th, 2016
Staff Member
Hi, we only match power tubes. We do not match preamp tubes such as the 12AX7.
Asked by Anonymous on April 29th, 2017.
Matt H.
May 2nd, 2017
Staff Member
Yes, according to the Orange website you amp takes two of these tubes.
Asked by Anonymous on May 16th, 2017.
Matt H.
May 16th, 2017
Staff Member
The pins are gold and this helps to prevent corrosion and buildup on the tubes pins. Other than the pins, they are the same tube as compared to the regular pin version.
Asked by Anonymous on May 24th, 2017.
Matt H.
May 24th, 2017
Staff Member
When plugged in this tube has the following dimensions: 1.94" (49.2mm) x 0.87" (22mm). You will want to measure your existing tubes to insure a proper fit.
Asked by Anonymous on August 25th, 2017.
Matt H.
August 25th, 2017
Staff Member
The S stand for spiral filament and refers to the internal construction. This will work in any situation where an ECC83/12AX7 is needed.
Asked by Anonymous on October 6th, 2017.
Matt H.
October 6th, 2017
Staff Member
Tube characteristics can be different from brand to brand, and because the tone of tubes can be highly subjective, we can not verify if these tubes will get you your desired tone. You can visit the "Tech Corner" of our website for a 12AX7 comparison of current made tubes. This has a wealth of information to help you make a decision.
Asked by Anonymous on February 16th, 2018.
Matt H.
February 16th, 2018
Staff Member
The plate design on these is slightly more compact but function just like any other 12AX7.
Asked by Anonymous on June 26th, 2018.
BradWbr
June 26th, 2018
Staff Member
All information we were able to find on a Bedrock 600 stated that it uses EL84 power tubes.

Product Reviews

4.93 out of 5 based on 42 reviews
- September 24th, 2021
5 out of 5

I've built and sold several 5F1 amp heads recently. I like using JJ 12AX7 preamp tubes in them for their consistently excellent sound and reliability. JJs have never let me down in this regard.

- August 31st, 2021
5 out of 5

Excellent replacement tubes for my Hendy Michelangelo. Best prices and fast shipping.

- July 17th, 2021
5 out of 5

Excellent service, quick shipping, and well packaged. Tube just as advertised.

- February 13th, 2021
5 out of 5

Used these JJ ECC83 tubes on a restoration of a vintage Knight stereo amplifier and the work great. To my ears sounds as good as the original Mullard 12AX7 tubes.

- January 10th, 2021
5 out of 5

After installing a complete set of JJ tubes in a Fender 68 deluxe reverb reissue, the customer said his amp sounds better than it ever has! I’ve had nothing but good experiences with JJ tubes,

- October 16th, 2020
5 out of 5

Used these to replace the same model tubes in a Hendyamps Michelangelo equalizer. Worked perfectly and sounded the same as the previous 4 year old tubes did when new. Thank you!

- October 2nd, 2020
5 out of 5

Put five of these in an old Carvin Nomad. Chimes out really nice. Quite operation.

- September 21st, 2020
5 out of 5

These are great tubes, I replaced all the tubes in my 1965 Fender PA amp, and these pre-amp tubes sound excellent.

- June 22nd, 2020
5 out of 5

Ordered 3 antique vacuum tubes. Well please with the items I got.

- December 5th, 2019
5 out of 5

I was having microphonics issues in a Peavey Encore 65 guitar amp (especially at high volume) and since my tube tester can't identify that kind of issue I replaced two 12AX7s and one 12AT7 with these JJ ECC83s and ECC81. Problem solved and, it may just be me but, I think it sounds better too. Good price too by the way.