8165/4-65A Eimac VHF Power Triode Transmitting Tube (Pull)
The Eimac 4-65 is a small radiation-cooled transmitting tetrode having a maximum plate dissipation rating of 65 watts. Although it is capable of withstanding high plate voltages, the interal geometry of the 4-65A is such it will deliver relatively high power output at low plate voltage.