Vacuum Tube - 12AX7 / ECC83, JJ Electronics

JJ Electronics
Pictured: Regular
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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
mikill71 - July 16th, 2017

awsome tube and store try them you won't regret it.

John Raborn - June 27th, 2013

I replaced tubes in an old dead Crate Vintage Club 30watt with the JJ 12Ax7's and JJ EL84's...WOW!!! It's never sounded this good. Im even going to say something I can't believe, I played thru a Kendrick New Joyzee I had Gerald Weber built until it got stolen, but this little 30 watt is driving warm all the way to SMOKEN!!! And this will be my amp until I get brave enough to build one myself. I also put a MOD reverb tank in it and its very smooth and sparkly.
Thanks for the great selection of part and supplies and the quick service. OUT of the PARK!!!

Morgandl - February 4th, 2013

These came as Oem in my Blues Deluxe. Loved the sound so I put them in a Hot Rod Deluxe. Talk about warming up the sound. They break up nicely when pushed as well.

January 15th, 2012

JJs are the most highly recommended tubes currently being manufactured. I have had nothing but good results using them. I hope they don't drop their standards.

December 8th, 2011

I put a pair of these tubes in my Morgan and haven't been happier. They help keep my tone ringing clear. This is my go-to 12ax7.

nycmetalzone - October 12th, 2011

These are the only tubes I use after a 10 year tone search these are the best for tone quality and best price. These are the TONE KING! I've tried them all NOS RCA(way expensive), EH Russian Made (harsh) and Tong-Sol (not impressed). But these JJ tubes are the kats meow! Smooth and musical!

whovvet.com - November 11th, 2010

I've had the Bugera V5 guitar amp for a month and think that its a great buy for the money and fun to play through. The overall sound was good. I purchased the JJ 12ax7/ECC83 gold pin preamp tube and the JJ EL84 power amp tube to backup the stock BUGERA tubes.I decided to put the JJ tubes in and use the stock as backups. The difference was very noticeable. The amp now sounds richer with more presence and smoothness. The JJ tubes improved all ranges of EQ and general tone whether I play clean or all out distortion. It was like having a switch that went from good to better.

matjptt.net - November 8th, 2010

I replaced the china tube in my ac30vr with the jj and i gotta say i like the result some more clean head room but not to much it still breaks up really nice!!! shipping was great also.

stevefreeman101mail.com - October 8th, 2010

I did not know how much the pre-amp tubes alter the tone and sound of an amp until I put 2 of the JJ12AX7 / ECC83s in my 65 Bandmaster. I have never heard a Bandmaster sound like that. I'm going to put 2 of these in everyone of my amps.

Sebastien Berger - September 14th, 2010

Very good. Not expensive and works really well. The shipping was also very fast. I will purchase here again.

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