Los 300B de VAIC especificamente indicaban diferencias Vs el 300B WE
We have two versions: The standard tube, called 300B, and a special version with mesh plates, called 300M.
The AV 300B is a direct replacement for the WE300B. The AV300M can also replace the WE300B, but only in amplifiers that work with a lower dissipation. There are two versions of the 300M. The first type 300M can work up to a plate dissipation of 17Watt. The second generation AV300M can work up to 27Watt.
Attention: NEVER put this is a standard 300B amplifier without first checking the plate dissipation!