Here we have valves such as the famous 300B, 211, 645, EL84 etc EL509The EL509 is a output pentode valve built on on octal base and is used mainly as a 'sweep tube'. 45 triodeThe Type 45 is a directly heated audio output triode. A very popular choice. 101D triodeThe 101D is a low power output directly heated triode, generally used as an putput valve and used with high sensitivity amplifiers. 811A triode811A is a direct heated triode with a high µ triode, can be used as high-frequency oscillation power amplification. 811 is similar to 811A. 211 triodeThe huge 4 pin directly heated triode, with an anode dissipation of 75 watts. 2A3 triodeA natural sounding valve, commonly used in sigle-ended mode. 300B triodeThe ultra linear 300B is a directly heated triode. 40W max anode dissipation. 6C33CB triodeA tough indirectly heated triode from Russia, 60W anode dissipation. 845 triodeThe mighty 845 is a directly heated triode with a max. anode dissipation of 100W. PL519 pentodeThe 40V 300mA heater version of the EL519. An often overlooked pentode valve. EL84The EL84/6BQ5 is a power pentode valve built on a 9 pin Noval base (B9A).