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Helix TWT - in which the radio waves interact with the electron beam while traveling down a wire helix which surrounds the beam. These have wide bandwidth, but output power is limited to a few hundred watts. [3] Coupled cavity TWT - in which the radio wave interacts with the beam in a series of cavity resonators through which the beam passes ...
Most post-war European thermionic valve (vacuum tube) manufacturers have used the Mullard–Philips tube designation naming scheme. Special quality variants may have the letter "S" appended, or the device description letters may be swapped with the numerals (e.g. an E82CC is a special quality version of an ECC82)
U – High-vacuum half-wave rectifier; UU – High-vacuum full-wave rectifier; Number: Sequentially assigned number Examples: Note: "AC/"-series receiver tubes are listed under other letter tubes - AC/ 6C10 (6CU7/ECH42) – Triode/hexode frequency converter, Rimlock base; 6F22 (6267/EF86) – Low-noise A.F. pentode, noval base
The inductive output tube (IOT) or klystrode is a variety of linear-beam vacuum tube, similar to a klystron, used as a power amplifier for high frequency radio waves. It evolved in the 1980s to meet increasing efficiency requirements for high-power RF amplifiers in radio transmitters. [ 1 ]
When installed, the tube projects through holes in the center of the cavity resonators, with the sides of the cavities making contact with the metal rings on the tube. A klystron is a specialized linear-beam vacuum tube , invented in 1937 by American electrical engineers Russell and Sigurd Varian , [ 1 ] which is used as an amplifier for high ...
Vacuum tube transmitter "Glowbugs" are a related aspect of vintage radio and harken back to the early days of amateur radio, when the majority of hams hand-crafted their own equipment. Smaller in size than "boat anchors", "glowbug" is a term used by US amateurs to describe a simple home-made tube-type radio set.
A valve RF amplifier (UK and Aus.) or tube amplifier is a device for electrically amplifying the power of an electrical radio frequency signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of ...
RMA 1P21 photomultiplier tube. In the years 1942-1944, the Radio Manufacturers Association used a descriptive nomenclature system for industrial, transmitting, and special-purpose vacuum tubes. The numbering scheme was distinct from both the numbering schemes used for standard receiving tubes, and the existing transmitting tube numbering ...