We sell A-grade brand new stock, not factory seconds like many other sellers. Ships from the USA, fully guaranteed.
Brand New in Box Plate Current Matched Pair of Shuguang 300B-98 Vacuum Tubes
The 300B may be one of the most famous power tubes of all time. Now in extreme scarcity, the original Western Electric, Senco and NU 300Bs are almost gone and are no longer affordable.
To solve the problem Shuguang of China started manufacturing the 300B which is a strict copy of the original Western Electric, especially in regards to the electrical characteristics. Known for excellent sound and reliability, it's no wonder that 80% of the world's 300Bs are now produced by Shuguang, it continues to be their best seller. Many high end brands come with these tubes installed.
These are brand new tubes straight from the factory in the original box.
Testing & Matching
Double-tested for Gm, Ip, Shorts, Leaks, Gas on a Triplett 3444, Space-Tech Easy Tube Tester or Maxi-Matcher. All of these testers bring tubes up to their full operating voltage and also check for plate current (Ip) as well as General Mutual Transconductance (Gm).
Matched within 10% or less by Plate Current & Gm