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1万円の超高級通信型ゲルマラジオを作る。100円ブックエンドの電子工作。アマチュア無線家も納得。
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ゲルマラジオでスピーカを鳴らす実験
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F74 - Zu Besuch bei Alois DK4PB Er zeigt uns sein Funk- und Technikmuseum Westerwald und vieles mehr
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子時計モニタの時刻調整をしてみた
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【大人の科学】不器用女子が鉱石ラジオを作ってみた
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VUメーター付きSP Selector
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How to make a 4-parallel coil using rain gutter pipes
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Tiny Radio Restoration With Detailed Procedure!
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America Had No Radio Crystals in 1941 — So Engineers Cut 30 Million From Brazilian Quartz
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00005
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The curtain has finally fallen on the history of Akihabara Shioya Wireless.
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German WW2 unique Light Communication system, Lichtsprechgerät 80/80
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A high-end germanium radio for 30,000 yen
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Cheap and super simple FM radio
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Homemade spy transmitter.
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ヤフオクで６０年前のトリオ５球スーパーを落札する
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Before You Trash Your Old PC Power Supply... Build This!
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Making extreme crystal radio part2.
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Turning Old Japanese Radio into Guitar Amp
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