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Beam tetrode
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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
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.
6L6
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6L6 is the designator for a beam power tube introduced by Radio Corporation of America in April 1936 and marketed for application as a power amplifier for audio frequencies. The 6L6 is a beam tetrode
Beam tetrode
…agreement with RCA of America, the design was passed to that company. RCA had the resources to produce a workable design, which resulted in the 6L6. Not long after, the beam tetrode appeared in a variety of offerings, including the 6V6 in December 1936, the MOV KT66 in 1937 and the KT88 in 1956…
A 6L6 tube manufactured by Sylvania
A 6L6 tube manufactured by Sylvania
Anode characteristics with screen grid (grid 2) voltage as parameter
Anode characteristics with screen grid (grid 2) voltage as parameter
Anode characteristics with the screen grid (grid 2) connected to the anode (i.e. used as a triode)
Anode characteristics with the screen grid (grid 2) connected to the anode (i.e. used as a triode)