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  1. Medieval Plague Epidemic and the background WAR

    Medieval Plague Epidemic and the background WAR

    44
  2. Vintage Victor SPE-8200 Record Player, Restored

    Vintage Victor SPE-8200 Record Player, Restored

    89
    28
    113
  3. The sound of TAISYO KOTO 'Sing Me A Song Of Araby'

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

    94
    23
    50
  4. AM 4MHz SW Band Marker/Transmitter

    AM 4MHz SW Band Marker/Transmitter

    64
    12
    34
  5. Simple 1308kHz Amplitude Modulator PCB Testing

    Simple 1308kHz Amplitude Modulator PCB Testing

    63
    14
    34
  6. 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)

    70
    16
    82
  7. 6N6P Single Stereo Amp. with Heater Trans OPT

    6N6P Single Stereo Amp. with Heater Trans OPT

    48
    11
    51
  8. ■SDRラジオとは…

    ■SDRラジオとは…

    19
  9. A way to check old variable capacitors

    A way to check old variable capacitors

    90
  10. 家庭で安価に出きる尿検査・1回5円

    家庭で安価に出きる尿検査・1回5円

    35
  11. ■家庭で出来る、DIY 尿検査・解説

    ■家庭で出来る、DIY 尿検査・解説

    12
  12. Six Steps to build 6BQ5(EL84) Stereo Amp PCB

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

    41
  13. Ultraviolet LED Board and Fluorescing substances Experiment

    Ultraviolet LED Board and Fluorescing substances Experiment

    13
  14. The sound of TAISYO KOTO 'My Blue Heaven'

    The sound of TAISYO KOTO 'My Blue Heaven'

    12
  15. A kind of 1960-70s Japan's industrial high school education

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

    16
  16. Osaka city mystery in Japan

    Osaka city mystery in Japan

    22
  17. 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 !

    22
  18. Modernized Experimental 3-TUBE Regenerative Radio

    Modernized Experimental 3-TUBE Regenerative Radio

    91
  19. Why they force you to be VACCINATED!

    Why they force you to be VACCINATED!

    56
  20. ■半世紀前のクイズ番組「ジェスチャー」

    ■半世紀前のクイズ番組「ジェスチャー」

    4
  21. ■半世紀前の通信高校講座（化学：有機窒素化合物）

    ■半世紀前の通信高校講座（化学：有機窒素化合物）

    4
  22. ■現役「でんじろう先生」のモーター実験

    ■現役「でんじろう先生」のモーター実験

    9
  23. ■半世紀前の通信高校講座（化学：金属のイオン化傾向）

    ■半世紀前の通信高校講座（化学：金属のイオン化傾向）

    1
  24. ■半世紀前の通信高校講座（化学：油脂とセッケン）

    ■半世紀前の通信高校講座（化学：油脂とセッケン）

    11
  25. Chaos to see LED illumination board

    Chaos to see LED illumination board

    64
    16
    30