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File:電気メガホンEM-202.JPG

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Description
English: TOA Corporation's EM-202, the first transistorized electric megaphone, or bullhorn. Developed in 1954, this was the first truly handheld public address system; previous portable P.A. systems were very heavy because of the vacuum tubes needed to power them.
日本語: 電気メガホンEM-202。東亞特殊電機製。世界初の電気メガホン。
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17 May 2009

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Date/TimeThumbnailDimensionsUserComment
current14:49, 17 May 2009Thumbnail for version as of 14:49, 17 May 20091,024 × 768 (161 KB)実用{{Information |Description={{en|1=EM-202}} {{ja|1=電気メガホンEM-202}} |Source=私物 |Author=私 |Date=2009年 |Permission= |other_versions= }} <!--{{ImageUpload|full}}--> Category:メガホン 拡声器

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