Pentagrid Converter
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The pentagrid converter was a radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio receiver. Grids of a 12SA7GT Pentagrid converter showing all 5 grids. 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…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The pentagrid converter was a radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio receiver. Grids of a 12SA7GT Pentagrid converter showing all 5 grids. 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.