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Audion amplifier. Diagram of an Audion triode valve that was the first amplifier. It was invented by Lee De Forest in 1907. De Forest worked on vacuum Stock Photo - Alamy
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Describe the construction and working of a triode valve Describe a circuit diagram for the study of its characteristics
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OSRAM ML6 CERAMIC BASED TRIODE 1940S FOR RAF T1154 & PX4 PX25 VALVE AM – MULLARD MAGIC
