Vacuum Tube - 12AX7 / ECC83, JJ Electronics

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

Starting at: $10.95
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.

RoHS Compliant
SKU:
T-12AX7-JJ-X
Item ID:
004452
Brand:
JJ Electronics
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 - GOLD
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 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 39 reviews
- September 13th, 2020
5 out of 5

I put this in my 50 year old Harmony 410A amplifier. This was a drop in replacement for the tube that was originally in the amp. Now my first amplifier from childhood that ended back in my hands after many many years is functioning perfectly.

- September 2nd, 2020
5 out of 5

Really happy with the service from Amplified Parts. This was my first order with them, and I got an order confirmation very quickly, and their site was very good at providing updates. My tubes were shipped the same day I ordered them and they arrived faster than I expected. Thanks!

I was previously running Groove Tube 12AX7's in my amp but see the JJ's highly recommended across various guitar forums I visit. I bought a complete set of 12AX7's and EL84's. I really didn't expect much of a difference, but boy was I surprised. After I plugged these in, my tone was night and day difference over the groove tubes. My amp has never sounded so good, and I didn't want to stop playing. It sounded much more alive, bright, and with a better mid-range punch. These were the gold pin JJ's and I have not compared them to their standard 12AX7's, so I'm not sure how much, if any, a difference the gold pins make. I might try the standard tubes next time just to see if the additional cost is worth it. Bottom line, you won't be disappointed with either JJ tubes or the service from Amplified Parts.

- June 24th, 2020
5 out of 5

I did not know how many power tube I needed to replace. But since the amplifier is dated 2003, might as well replace all of them. The replacement was successful. Minor adjustment to bias, as advertised. Great tubes, sounds just as good as the OEM tubes.

- June 16th, 2020
5 out of 5

Very nice, very clean!
Used it to replace the Hughes & Kettner-branded ECC83 on my (low mileage) Attax 100 head (nothing wrong with it, just wanted a fresh one). Sounds a bit clearer and brighter that the H&K. Very happy

- May 24th, 2020
5 out of 5

Customer service was outstanding. Shipped in a timely manner.

- May 4th, 2020
5 out of 5

I have a line 6 Bogner amp and this was by far the best improvement to the preamp section. My amp does not sound thin and fizzy anymore. Great job! I paired it with a Mullard reissue to get the best of cleans and distortion. I would buy it again.

- December 29th, 2019
5 out of 5

Order a pair of ECC83's from JJ's. Great price, quick delivery, excellent customer service.

- 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!!