In electronics, the 300B is a directly-heated power triode vacuum tube with a four-pin base, introduced in 1938 by Western Electric to amplify telephone signals. It measures 6.4 in (16 cm) high and 2.4 in (6.1 cm) wide, and the anode can dissipate 40 watts thermal.

Jan 20, 2025 · The 300b tubes were in cages that most people would have significant trouble removing. He makes amps that are visually attractive and small footprint. They were left alone, apparently, and both failed after about 1000 hours.

Upgrade your amplifier setup with the finest electron tube ever made. Made by hand in the USA using original specifications. Guaranteed with 5-year extended warranty. The 300B is known for its sound quality and powerful performance in both single-ended & push-pull amplifiers. What makes the 300B so great?

If you are a lover of single ended triode amplifiers, no doubt you are familiar with the mighty 300B. The mightiest of them all are the vintage Western Electric 300Bs, and then if you can find them, the reissued WE 300Bs that came out around 2005 or so.

Since those days a true Aladdin’s cave of 300B valves have become available. Several vendors in China and Taiwan, two in Russia and three in the Czechs and Slovak Republics make 300B’s. Even the legendary Western Electric 300B has been put back into production.

Jan 26, 2016 · Noam Bronstein from Wall Of Sound gives his perspective and provides a full review of 7 different 300B vacuum tubes from 4 different manufacturers.

In this article, Howard Stone first leads us through a nostalgic history of the Western Electric Type 300B audio amplifier triode tube. What follows is a report on the resurrgence of the 300B through "reissues" being produced by several manufacturers.

The 300B vacuum tube was first mass produced by Western Electric in 1938. Since that time the 300B power tube has become possibly the most revered tube in high end hi-fi amplifiers. We have a large selection of 300B tubes in stock everyday.

With the optional 10:1 compression ratio, brake horsepower became 355 hp from the same 354 cu in (5.8 L) engine, and the 300B became the first American car to produce 1 horsepower per cubic inch, besting Chevrolet with their fuel-injected 283 cu in (4.6 L) by one year.

Are you looking for the very best 300B tubes for your vacuum tube amplifier? This is the place to start. Check out the following 300B tube reviews for guidance in getting the best possible tone out of your tube equipment.