JJ Electronic

New Matched Pair (2) JJ E83CC / 12AX7 A-Frame Grid Short Plate Vacuum Tubes

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New Gain Matched Pair of JJ E83CC (12AX7) A-Frame Short Plate Vacuum Tubes

The JJ E83CC uses A-frame construction with boxed plates for utmost stability and reliability. This ensures lower noise for audio applications. With the same gain rating as a standard 12AX7, the E83CC is an excellent choice for any high fidelity amplifier or guitar amp/studio equipment. Directly interchangeable with any 12AX7, ECC83 or 7025.

Will work in place of: E83CC, 12AX7, ECC83, ECC83S, 12AX7WA, 12AX7, CV4024

Testing and/or Matching

At VIVA TUBES, all of our customers get the same high standard of testing and matching. Some sellers charge more for premium matches but we believe all of our customers should get the same level of quality and service. 

Tubes are tested and/or matched at full operating voltage with regulated power supply on a Maxi Matcher tester for general mutual transconductance (Gm). In addition, power tubes are tested/matched by plate current (Ip) and preamp tubes are tested/matched by gain. Rectifier tubes will be tested for emissions on a calibrated military grade tube tester. 

Our goal is to match within 5% with an upper limit of 15% (15% is the industry limit to consider a set).

Hand written test data included.

Note that we do offer a few models which are tested & matched at the factory. They will be matched by the same parameters (Ip & Gm) but to the manufacturer's standards. Factory testing will be indicated in the item title and description. 


We offer a minimum 90 day guarantee covering functional defects - including noise unless otherwise stated. The guarantee period begins the day you receive your order.

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2 Reviews

  • 5
    JJ 12ax7 a-frame

    Posted by Sam on 26th Jul 2023

    I put these in an Aric Audio phono stage. Really opened things up from the stock JJ tubes: Great clarity and gorgeous tone and better image specificity. Recommended, and Viva Tubes provided fast, impeccable shipping as well. Won’t shop anywhere else.

  • 5
    Midrange Magic

    Posted by Patrick Schubert on 13th Nov 2022

    Between the JJ E83cc and the Electro Harmonix 7025, I see no need to bother with NOS tubes anymore. The JJE83CC has the most midrange depth and detail that I've ever heard in any 12AX7 type tube, except for maybe the EHX 7025. This includes vintage Amperex, Mullard and Telefunken. But the midrange doesn't sound too forward or dominant, either. Very well balanced top to bottom. Sweet highs that never sound etched or fatiguing. Deep, clear and controlled bass. There must be some magic in the frame grid design. Whatever the case, these are special! And a big thank you to Viva Tubes for the always exceptional service!

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