See the third picture for an example of what we mean. At Tonal Tubes we match tubes using a tester that enables us to match tubes at high plate voltages as well as various bias voltages. This means that when you install these tubes, they will be a tight match inside your amplifier. We have very strict standards when it comes to matching.
We hand match power tubes within 5% for both plate current and transconductance. Most other retailers will match to just one of these values, however it is important to have both of these values matched. This is not a simple process and does take lots of time and dedication since tubes can vary so much from the factory.
Having matched power tubes is important because it reduces hum from your amplifier. It also allows you to get more life out of your tubes, since each tube will be working approximately the same amount. Why You Should Do Business With Us.
Every tube is checked for shorts and leakage on a calibrated Eico 667 tube tester. Comes with original packaging from the factory, as shown in the picture. We are musicians who crave an amazing tone. We all know that swapping out tubes can be one of the more effective ways of improving your tone. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets".The seller is "tonaltubescom" and is located in this country: US. This item can be shipped to United States.