New Electro-Harmonix 12AX7 / ECC83 GOLD PINS Vacuum Tube

New Gain Tested Electro-Harmonix 12AX7 / ECC83 GOLD PINS Vacuum Tubes

This is the same tube as the Electro-Harmonix 12AX7 with a few big differences. The pins are plated with gold to prevent corrosion and to protect the pins (they also fit a little more snugly in the socket). Electro-Harmonix also selects their best stock for their ‘Gold’ line. The EHX 12AX7 has become a standard, known for its high gain coupled with excellent mids and bass. It has a spiral wound filament to help cut down on noise and hum just like the vintage 7025 or 12AX7A tubes.

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. 

Guarantee

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.