radio 256-0078-00V105 Power amplifier tube type RK-4d32; tetrode
The RK-4D32 is a beam tetrode, for use as an RF power amplifier or oscillator. The anode construction with its auxiliary cooling fins is rated for 47 Watts anode dissipation and 100 Watts output when biased in Class C. The wide glass tube envelope is 55 mm in diameter and, excluding the B7A base pins, is 115 mm tall.Reference: Datasheet. Type RK-4D32 was first introduced in 1959.
Base(Codex=Mci) Top contact with a capFilamentVf 6.3 Volts / If 3.75 Ampere /Indirect/DescriptionAll glass body with septar transmitting base. With 600 V supply, as class C amplifier, one tube can deliver 100 W RF power with 1.25 W grid drive.
Similar to 4D22/RK4D22, with 6.3 V heater.

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