发明授权
US3555430A Television receiver converter 失效
电视接收转换器

Television receiver converter
摘要:
THE DISCLOSURE CONCERNS VARIOUS USUALLY EFFECTIVE WAYS IN WHICH VHF, OR VHF AND UHF, SIGNALS MAY BE TRANSMITTED BY COAXIAL CABLE AS VHF AND THEN CONVERTED TO UHF AND SUPPLIED TO A TELEVISION RECEIVER, TOGETHER WITH TUNING THEREOF BY LOCAL OR AUXILIARY UHF TUNING MEANS.
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