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Photomultiplier
Photomultiplier
Dynodes inside a photomultiplier tube
Dynodes inside a photomultiplier tube
Fig. 2: Typical photomultiplier voltage divider circuit using negative high voltage.
Fig. 2: Typical photomultiplier voltage divider circuit using negative high voltage.
Internal metallisation as a protective screen against unwanted lights sources
Internal metallisation as a protective screen against unwanted lights sources
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Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages
Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages
Hot tubes in an audio power amplifier, emitting their distinctive red-orange glow
Hot tubes in an audio power amplifier, emitting their distinctive red-orange glow
Illustration representing a primitive triode vacuum tube and the polarities of the typical DC operating potentials. Not shown are the impedances (resi
Illustration representing a primitive triode vacuum tube and the polarities of the typical DC operating potentials. Not shown are the impedances (resistors or inductors) that would be included in series with the C and B voltage sources.
Radio station signal generator with vacuum tubes
Radio station signal generator with vacuum tubes