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The RS282 is an RF transmitting pentode with a 100 Watt anode dissipation.

The valve is marked as having an 8 Volt heater and takes 1.6 Amps, the cathode is oxide coated.

The anode is connected to the top cap and the cathode and control grid are connected to independent side connections.

There is an helical inner screen that is connected to the anode.

Despite its impressive appearance this Telefunken transmitting triode has lowly ratings. Intended as a Class B RF amplifier, maximum rated RF output is only 110 W at a maximum permissible frequency of 6 MHz. The most interesting thing about it is that it has an indirectly-heated oxide-coated cathode. The anode rating is 1000 V max.

The wide glass tube envelope is 55 mm in diameter and, excluding the special base pins, is 240 mm tall.

Reference: Data-sheet. Type RS282 was first introduced in 1934. See also 1934 adverts.

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.