New Current Matched Pair (2) Electro-Harmonix 300B Gold Pins Ceramic Tubes. This product data sheet is originally written in English. Brand New Electro-Harmonix 300B Gold Pins Ceramic Vacuum Tubes - Matched Pair. We only sell factory fresh tubes and NOT seconds as we are an authorized dealer for New Sensor (EHX) and JJ. Ultra-long life, high-quality construction and superior sonics with improved performance make it a top choice over 300B types made by other manufacturers.
Like the original Western Electric 300B, it has the eight course, directly heated filament, 40 Watt plate dissipation, classic large-shoulder tube glass, and is available singly or in matched pairs. The 300B EH's plate curves and static DC characteristics (plate resistance, transconductance, mu) also exactly match the originals for superior performance in any vintage or modern 300B amplifier.
We test and/or match our tubes by Gm & Plate Current using a state of the art digital Maxi-Matcher tube tester. The Maxi-Matcher simulates a real circuit and tests tubes in real-world conditions. We also check our tubes for other issues like shorts on calibrated and vintage tube testers. We match our tubes +/- 5% with an overall tolerance of 10%.
While we do screen for noise and microphonics, even the best tube testers are quite bad at finding these faults. The only real test is with your ears. We guarantee that our tubes will be free of noise or microphonics but please be aware that there isn't a whole lot we can do to ensure your tube won't be.
We guarantee our tubes for 90 days upon receipt. Noise and/or microphonic issues are covered. The item "New Current Matched Pair (2) Electro-Harmonix 300B Gold Pins Ceramic Tubes" is in sale since Wednesday, January 16, 2019. This item is in the category "Musical Instruments\Guitars & Basses\Parts & Accessories\Amplifier Parts". The seller is "onlyglass" and is located in Easthampton, Massachusetts.This item can be shipped worldwide.