Here we have valves such as the famous 300B, 211, 645, EL84 etc
The EL509 is a output pentode valve built on on octal base and is used mainly as a 'sweep tube'.
The 101D is a low power output directly heated triode, generally used as an putput valve and used with high sensitivity amplifiers.
811A is a direct heated triode with a high µ triode, can be used as high-frequency oscillation power amplification. 811 is similar to 811A.