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Valve The EF89 is a miniature RF voltage amplifier. Telam describes the EF89 as a variable μ pentode for use as an RF or IF amplifier in FM/AM receivers and is designed to operate with a tuned anode circuit.
Valve The EF89 is a miniature RF voltage amplifier. Telam describes the EF89 as a variable μ pentode for use as an RF or IF amplifier in FM/AM receivers and is designed to operate with a tuned anode circuit.
Specific References