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Half Wave and Full Wave Rectifiers II

A rectifier is a vacuum tube or valve that converts alternating current AC into Direct current, which flows in one direction. This way, we have Direct Current and polarity in our audio systems, which allows us to play music and choose polarity in our speakers, too.

The most common audio rectifiers are 5U4G U52 53KU 52KU CV378 GZ37 GZ33 GZ32 GZ34 U50 5Y3 MU14 MU12 U12 U14 FW4/500 FW4/800

U50 5Y3GT U52 5R4GY CV717 5U4G U10 U12 U14 U18/20 EZ80 EZ81 EZ90 6CA4 6X4 80 etc

1562 Philips balloon half-wave vacuum rectifier fully tested rare

Philips 1562 audio rectifier £ 100

1821 Philips balloon rare clear glass clear top black ribbed plate full getter U12 U12 stunning!

Philips 1821 clear glass £150 pair.

Philips 1821 clear glass £ 200 three pieces.

1821 Philips BVA balloon ribbed plate gold top lettering DW2 full getter

Philips BVA balloon 1821 £ 150 pair.

Philips BVA balloon 1821 £ 250 quartet.

274A Early type STC 4274A Standard Telephones and Cables UK made full getter HOLY GRAIL sought after pair full wave rectifiers

STC W.E. 4274A Red Paint F on glass GBP 2,800 pair.

274A Early type STC 4274A Standard Telephones and Cables UK made full getter K 14 type HOLY GRAIL rare pair full wave rectifiers

STC 274A STC 4274A audio rectifiers £ 2,800 pair

274A STC 4274A Red print HOLY GRAIL Standard Telephones and Cables pair full wave rectifiers tested 100%

STC Western Electric 4274A £ 2500 pair

274A Western Electric 274A HOLY GRAIL of all audio rectifiers UX4 base super rare engraved print on base tested 100%

Western Electric 274A £ 4,500 pair

274B Western Electric 274B engraved letters on base HOLY GRAIL U52 5U4G full wave rectifiers tested 100% pair

Genuine Western Electric 274B engraved base £ 4,000 pair

43IU Cossor black ribbed plate full getter B4 base MU12 MU14 IW3

Cossor 43IU £ 400 pair