Last Updated
：2025/11/20
pentagrid converter
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Quizzes for review
A compound thermionic valve used in superheterodyne radio receivers.
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pentagrid converter
The technician replaced the pentagrid converter to fix the radio's weak signal.
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The technician replaced the pentagrid converter to fix the radio's weak signal.
音声機能が動作しない場合はこちらをご確認ください
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