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.

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?

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.

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.

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.

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.

Nov 27, 1999 · In the last two years, the available choices in 300B output tubes for one's low-wattage single-ended power amplifier have become an embarrassment of riches.

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.

Nov 2, 2022 · The Western Electric 300B is known for its sound quality. The magic is in its directly heated, oxide-coated filament. Though this combination is by no means unique to the 300B, the filament’s coating is.

Jun 15, 2024 · We see 300B often used with medium efficiency loudspeakers. Meaning, the tube often needs to work relatively hard, which is indeed what the 300B is designed for. However, a Single Ended, no-feedback amplifier can not combine highest output power with lowest distortion.