For other types of frequency converters please, see Frequency mixer.
Basic heptode-based self-oscillating pentagrid converter circuits. Top: Indirectly-heated variant Bottom: Directly-heated variant, which requires the cathode to be groundedGrids of a 12SA7GT pentagrid converter, showing all five grids
The pentagrid converter is a type of radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio receiver.
The pentagrid was part of a line of development of valves that were able to take an incoming RF signal and change its frequency to a fixed intermediate frequency, which was then amplified and detected in the remainder of the receiver circuitry. The device was generically referred to as a frequency changer or just mixer.
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The pentagridconverter is a type of radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio...
A buck converter or step-down converter is a DC-to-DC converter which decreases voltage, while increasing current, from its input (supply) to its output...
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are filtered out. The same result was achieved historically by the pentagridconverter or a triode and hexode in a single tube, but can be implemented in...
local oscillator and mixer, combined in the function of a single pentagridconverter tube. Various alternatives such as using a combination of a triode...
voltages to be used. Physical convenience. Grid top caps on frequency converters could be connected directly to an adjacent coil; Anode top caps on output...
specifically designed for superheterodyne operation, most notably the pentagridconverter. By reducing the tube count (with each tube stage being the main...
supply, did not cause a problem. The frequency mixer was of the pentagridconverter design to save the cost of a separate oscillator tube. The detector...
using a clip with an attached wire lead. An example would be the 6A7 pentagridconverter. Later, some tubes, particularly those used as radio frequency (RF)...
tubes with multiple grids beside the pentode, such as the hexode and pentagridconverter tube, have been be used to make similar negative transconductance...
mixing products f1 − f2 and f1 + f2 from the two anodes. Similar to a pentagridconverter, the cathode and the first two grids can be made into an oscillator...
thermoelectric effect, movement of heat due to electric current flow. pentagridconverter A type of self-oscillating vacuum tube used a frequency mixer in...
the antenna. In later years this was similarly accomplished by the pentagridconverter tube, a similar two-input amplifying/oscillating valve, but which...
The 1L6 is a 7 pin miniature vacuum tube of the pentagridconverter type. It was developed in the United States by Sylvania. It is very similar electrically...
triode-hexode, triode-heptode or triode-octode. A (Russian: А) – Pentagridconverter. V (Russian: В) – Vacuum tube with secondary emission. L (Russian:...
A charge pump is a kind of DC-to-DC converter that uses capacitors for energetic charge storage to raise or lower voltage. Charge-pump circuits are capable...
Static Converters in Power Systems. Springer-Verlag. p. 1. ISBN 978-1-4020-7890-3. The first 25 years of HVDC transmission were sustained by converters having...
circuit and to reduce harmonics are connected in series to form a 12-pulse converter. Each thyristor is cooled with deionized water, and the entire arrangement...
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