R-F Amplifier Pentode
RCA-803 is a pentode transmitting tube of the thoriated-tungsten filament type for use as an r-f amplifier, frequency multiplier, oscillator, and suppressor-, grid-, or plate-modulated amplifier. The plate connection is brought out through a separate seal at the top of the bulb to insure excellent insulation and low grid-plate capacitance. In adequately shielded circuits, neutralization to prevent feedback is generally unnecessary. The suppressor is connected to its individual base pin. The 803 may be operated at maximum ratings in all classes of service at frequencies as high as 20 megacycles. The maximum rated plate dissipation of the tube is 125 watts. RCA-803 has a ceramic base.
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