Vacuum Tube - 12AX7 / ECC83, JJ Electronics

JJ Electronics
Pictured: Regular
Pictured: Regular
Pictured: Gold
Pictured: Gold
Pictured: Regular
Pictured: Regular
Pictured: Gold
Pictured: Gold
Pictured: Regular
Pictured: Regular
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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.

Available with gold pins.

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

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Asked by Anonymous on November 11th, 2016. 1 person subscribed to this question
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Anonymous
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
Anonymous
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. 1 person subscribed to this question
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Anonymous
June 1st, 2016
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. 1 person subscribed to this question
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Anonymous
August 24th, 2016
Hi, we only match power tubes and do not balance preamp tubes.
Asked by Anonymous on May 2nd, 2017. 1 person subscribed to this question
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Anonymous
May 2nd, 2017
Yes, according to the Orange website you amp takes two of these tubes.
Asked by Anonymous on May 16th, 2017. 1 person subscribed to this question
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Anonymous
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. 1 person subscribed to this question
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Anonymous
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. 1 person subscribed to this question
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Anonymous
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. 1 person subscribed to this question
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Anonymous
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. 1 person subscribed to this question
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Anonymous
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. 1 person subscribed to this question
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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. 1 person subscribed to this question
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Anonymous
July 20th, 2018
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
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Product Reviews

5.00 out of 5 based on 31 reviews
Jeffrey C - October 5th, 2009

Out of all of the current production 12AX7's, I think this is the best. I've used these in guitar amps (Ampeg VT-22) and hi-fi gear (Fisher 400C). It is a clean sounding tube.

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