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Tetrode
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A tetrode is a vacuum tube having four active electrodes. The four electrodes in order from the centre are: a thermionic cathode, first and second grids, and a plate. There are several varieties of te
4-1000A 1 KW radial beam power tetrode in an amateur radio transmitter
4-1000A 1 KW radial beam power tetrode in an amateur radio transmitter
Tetrode of the Bi-Grid Valve type
Tetrode of the Bi-Grid Valve type
Circuit using bi-grid tetrode oscillator as AM transmitter. H is a source of high voltage.
Circuit using bi-grid tetrode oscillator as AM transmitter. H is a source of high voltage.
View of the interior of an Osram S23 screen grid valve. In this valve the anode is in the form of two flat plates. The wires of the screen grid can al
View of the interior of an Osram S23 screen grid valve. In this valve the anode is in the form of two flat plates. The wires of the screen grid can also be seen. The anode connection is at the top of the envelope to minimise anode-grid capacitance
Beam tetrode
Videos
A beam tetrode, sometimes called a beam power tube, is a type of vacuum tube or thermionic valve that has two grids and forms the electron stream from the cathode into multiple partially collimated be
Tetrode
…second grids, and a plate (called anode in British English). There are several varieties of tetrodes, the most common being the screen-grid tube and the beam tetrode. In screen-grid tubes and beam tetrodes, the first grid is the control grid and the second grid is the screen grid. In other tetrodes one of the grids…
Radial beam power tetrode, designed for radio frequency use. This type of beam power tube does not use beam confining plates.
Radial beam power tetrode, designed for radio frequency use. This type of beam power tube does not use beam confining plates.
6L6 type beam tetrode electrode structures with anode cut open. The beam confining plates are the silver coloured structures to the left and right
6L6 type beam tetrode electrode structures with anode cut open. The beam confining plates are the silver coloured structures to the left and right
Twin beam tetrode RCA-815, used as the bias oscillator tube in the Ampex Model 300 "bathtub" 1/4" full-track professional audio tape recorder
Twin beam tetrode RCA-815, used as the bias oscillator tube in the Ampex Model 300 "bathtub" 1/4" full-track professional audio tape recorder
Internal Construction of 4CX250B radial beam power tetrode. Anode structure with attached cooling fins top left, cathode and control grid structure to
Internal Construction of 4CX250B radial beam power tetrode. Anode structure with attached cooling fins top left, cathode and control grid structure top right, screen grid bottom. Note absence of beam plates, cylindrical symmetry, and slotted screw holes, allowing alignment of the screen grid during manufacture.Inset: Complete valve.