Vacuum Tubes - Electronics at Work: 1943 Educational Film

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  • เผยแพร่เมื่อ 1 ก.พ. 2025

ความคิดเห็น • 6

  • @WB2GPU
    @WB2GPU 5 หลายเดือนก่อน +2

    Incredible life-changing technology that was almost entirely made obsolete in the next thirty years.

    • @nw7us
      @nw7us  4 หลายเดือนก่อน

      Yet, still has many modern uses. Even I still use tubes in certain equipment (guitar amps, amateur radio amp, and when I go for x-rays, medical use). Certainly the silicon electronics have become the majority technology, but, for many reasons (even as extreme as protection from a nuclear blast - if you survive such an EMP event) tubes have value, today.

    • @WB2GPU
      @WB2GPU 4 หลายเดือนก่อน +1

      My only point was that 97% of all tube based devices have been replaced by the semiconductor. I only find one amateur radio amplifier maker has a tube based model, the Alpha 8410 for $8,000.00.
      Ninety percent of guitar amps sold are semiconductor based.
      Commercial Radio Stations and X-Ray machines still use tubes. Some high-power systems, like certain radars, jamming systems, and high-frequency (HF) transmitters, may still use tubes like klystrons, traveling-wave tubes (TWTs), and magnetrons. However, semiconductors are now built in EMP hardened enclosures and Gallium Nitride (GaN) and Gallium Arsenide (GaAs) transistors, are becoming more common in military applications because they are more resistant to EMP.
      I am still in awe of the tube, but I no longer want to mess around high voltage and the poor efficiency and cooling requirements are show stoppers for me now. Also, finding tubes is not fun and the Chinese products are a crap shoot.

  • @katyvan
    @katyvan 5 หลายเดือนก่อน +2

    Very intresting, thank you 73 on6wv

    • @nw7us
      @nw7us  5 หลายเดือนก่อน

      Glad you enjoyed it!

    • @katyvan
      @katyvan 4 หลายเดือนก่อน

      @@nw7us Hi Tomas :) what is your emailadress, please ? I have a question about HAM , 73 Katy on6wv