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Questions tagged [vacuum-tubes]

This tag is for questions relevant to vacuum tubes, also known as thermionic valves or simply valves.

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Pentode vs. Triode in Tuned RF Reflex Receiver

I'm planning on building a multi-band vacuum tube receiver. I've got a circuit diagram in hand for a two triode twin reflex (P.E. Edelman, Reflex Radio Receivers, 1924, Fig. 35), and expect to use ...