Vacuum Tube - 12AX7 / ECC83, JJ Electronics

JJ Electronics
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Vacuum Tube - 12AX7 / ECC83, JJ Electronics

Starting at: $9.75
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Originally: $10.95
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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.

RoHS Compliant
SKU:
T-12AX7-JJ-X
Item ID:
004452
Brand:
JJ Electronics
Part Numbers
Pin TypeOur Part NumberUPC/EAN
GoldT-12AX7-GOLD-JJ797734820959
RegularT-12AX7-S-JJ844632022081
Product Measurements
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.

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Questions and Answers

Click each question to see its answers.
Asked by Anonymous on November 11th, 2016.
Matt H
November 11th, 2016
No, the only time you might need to rebias is when you are replacing power tubes.
Macktires4
November 13th, 2016
Will I have to rebias my EVH 5150 III amp if I put these in
Matt H
November 16th, 2016
No, the only time you might need to rebias is when you are replacing power tubes.
Asked by Anonymous on May 27th, 2016.
JustinG
June 1st, 2016
Staff Member
Top Contributor
I would suggest checking out our tech corner article comparing preamp tubes. Personally I have Tung Sol 12AX7's in mine and I think they are great for the Blues Jr. You also couldn't go wrong with the TAD premium selected 12AX7's.
Asked by Anonymous on August 24th, 2016.
Matt H
August 24th, 2016
Hi, we only match power tubes and do not balance preamp tubes.
Asked by Anonymous on May 2nd, 2017.
Matt H
May 2nd, 2017
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
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
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
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
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
The plate design on these is slightly more compact but function just like any other 12AX7.
Asked by Anonymous on June 25th, 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.
Asked by Anonymous on July 20th, 2018.
CurtisG
July 20th, 2018
Staff Member
Please see our 12AX7 comparison chart that has current production 12AX7's listed by gain rating found here https://www.amplifiedparts.com/tech-corner/12ax7-comparison-current-made-tubes

Product Reviews

5.00 out of 5 based on 32 reviews
- October 31st, 2019
5 out of 5

Installed this 12ax7 in a fender roc pro, I was very impressed with the tone.

- August 1st, 2019
5 out of 5

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!

- March 14th, 2019
5 out of 5

Great tubes, brought my 1971 Bassman back to life!!

- March 14th, 2019
5 out of 5

Great tubes, brought my 1971 Bassman back to life!!

- March 5th, 2019
5 out of 5

Excellent quality product, and the shipment arrived much sooner that I anticipated.

Thanks!

- November 19th, 2018
5 out of 5

Re-tubing a 1970 amplifier and realized that I needed ONE MORE 12AX7 valve. Found "AmplifiedParts" and got it shipped straight away. Fair price, too. I would recommend them to a friend. d

- November 19th, 2018
5 out of 5

Re-tubing a 1970 amplifier and realized that I needed ONE MORE 12AX7 valve. Found "AmplifiedParts" and got it shipped straight away. Fair price, too. I would recommend them to a friend. d

- August 18th, 2018
5 out of 5

I put JJ 12AX7’s in my Fender Tweed Deluxe Hot Rod amp and it really smoothed out the sound. JJ tubes always make my amps sound better.
I ordered my tubes on a Tuesday evening and installed them Friday morning. Supersonic shipping.

- August 18th, 2018
5 out of 5

I put JJ 12AX7’s in my Fender Tweed Deluxe Hot Rod amp and it really smoothed out the sound. JJ tubes always make my amps sound better.
I ordered my tubes on a Tuesday evening and installed them Friday morning. Supersonic shipping.

- April 13th, 2018
5 out of 5

I installed the JJ 12ax7 in a phono preamp line driver they sound great very balanced and a lot clearer image I will buy them again highly recommended

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