EFHW Antenna Power Rating

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  • เผยแพร่เมื่อ 11 มิ.ย. 2023
  • We show a method of constructing an EFHW antenna for portable operation like field day, and POTA, and emergencies.
    Here is a link to my previous video showing the construction of the base/counterpoise.
    • Mast Support for Porta...
    Here is a link to a video showing how to make a common mode choke.
    • Video
    Here is a link to the clear PVC plastic.
    www.mcmaster.com/products/pvc...
    Here is a link to my video about thermocouples.
    • Thermocouples, how the...
    The thermocouple meter used in this video costs only $ 25.00 (USD). Here is a link to my video about this TC meter.
    • Thermocouple Meter Rev...
  • วิทยาศาสตร์และเทคโนโลยี

ความคิดเห็น • 7

  • @fotografm
    @fotografm 7 หลายเดือนก่อน +1

    Nice design and excellent analysis of what can happen in ferite materials !

    • @Jimscoolstuff
      @Jimscoolstuff  7 หลายเดือนก่อน +1

      Thanks for your comment.

  • @Last_day_events
    @Last_day_events ปีที่แล้ว

    How many watts were you using in your test?

    • @Jimscoolstuff
      @Jimscoolstuff  ปีที่แล้ว

      The answer to your question is in the video at time 7:17. Thanks for your comment.

    • @Last_day_events
      @Last_day_events ปีที่แล้ว

      @@Jimscoolstuff Thank You. I missed that. What gauge is that wire that goes up the mast? What is the power rating of that? Is there any ARRL chart for the diameter of that wire vs power?

    • @Jimscoolstuff
      @Jimscoolstuff  ปีที่แล้ว

      @@Last_day_events I used #22 wire. The impedance of the antenna is 49 x 50 ohms. This is 2450 ohms. At 100 watts the current into this wire is 0.2 amps at the feedpoint and increases to a maximum of 1.4 amps at the quarter wave point. There are much bigger losses in the ferrite core than in the wire.

    • @Last_day_events
      @Last_day_events ปีที่แล้ว

      @@Jimscoolstuff Wow, that's a very big help to me. Thank you !