1. A kind of 1960-70s Japan's industrial high school education (in Japanese)

    A kind of 1960-70s Japan's industrial high school education (in Japanese)

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  2. Vintage Victor SPE-8200 Record Player, Restored

    Vintage Victor SPE-8200 Record Player, Restored

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  3. Medieval Plague Epidemic and the background WAR

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  4. A way to check old variable capacitors

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  5. Six Steps to build 6BQ5(EL84) Stereo Amp PCB

    Six Steps to build 6BQ5(EL84) Stereo Amp PCB

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  6. ■SDRラジオとは…

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  7. Osaka city mystery in Japan

    Osaka city mystery in Japan

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  8. A kind of 1960-70s Japan's industrial high school education

    A kind of 1960-70s Japan's industrial high school education

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  9. Why they force you to be VACCINATED!

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  10. Japan's 300-Years-ago-common-sense shows why mRNA Vax is DANGEROUS !

    Japan's 300-Years-ago-common-sense shows why mRNA Vax is DANGEROUS !

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  11. Modernized Experimental 3-TUBE Regenerative Radio

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  12. ■半世紀前のクイズ番組「ジェスチャー」

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  14. ■現役「でんじろう先生」のモーター実験

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  15. ■半世紀前の通信高校講座(化学:金属のイオン化傾向)

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  17. Simple 1308kHz Amplitude Modulator PCB Testing

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  18. AM 4MHz SW Band Marker/Transmitter

    AM 4MHz SW Band Marker/Transmitter

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  19. Chaos to see LED illumination board

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  20. The sound of TAISYO KOTO 'Sing Me A Song Of Araby'

    The sound of TAISYO KOTO 'Sing Me A Song Of Araby'

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  21. ■家庭で出来る、DIY 尿検査・解説

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  23. 6N6P Single Stereo Amp. with Heater Trans OPT

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  24. 家庭で出来る、DIY尿検査・解説

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  25. The old radio sound with Paper Cup Piezoelectric Speaker

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