Vacuum Tube - 12BH7, Electro-Harmonix

New Gain Matched Trio of Electro-Harmonix 12BH7 Gold Pins Vacuum Tubes The newly produced Electro-Harmonix 12BH7 boasts twin triodes with 3.5 watts of dissipation per plate. An excellent replacement for any NOS or vintage 12BH7. Gold pins offer a less corrosive conductor as well ...New Gain Matched Trio of Electro-Harmonix 12BH7 Gold Pins Vacuum Tubes The newly produced Electro-Harmonix 12BH7 boasts twin triodes with 3.5 watts of dissipation per plate.

An excellent replacement for any NOS or vintage 12BH7. Gold pins offer a less corrosive conductor as well as a cleaner, more consistent voltage. 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).

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.