Tesla/JJ JJ EZ81 / 6CA4 Rectifier Vacuum Tube Made In Slovak Republic

The JJ EZ81 is a rectifier vacuum tube that is based on the original Czech Tesla EZ81 from the mid 1970s. The JJ EZ81 design is based on the original Czech Tesla EZ81 because the original Tesla was an excellent design. The JJ EZ81 is a new version of the EZ81/6CA4. The 6CA4 and EZ81 are equivalent and can be used interchangeably.