Electronics on the floor: Another sliding variable capacitor

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  • Опубліковано 9 січ 2025

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  • @joeshmoe7899
    @joeshmoe7899 3 роки тому +9

    Did this with 2 beer cans. Split one, and slide it over the other. Wire on both ends. 10 to 400pF. Cans already have an insulating wrap.

    • @tvdylan
      @tvdylan Рік тому

      400 pf ! pretty good ! is it the general rule that the more surface area the more pf's we get ? i imagine the two cans slide nice n close to each other too !

    • @bobhs1605
      @bobhs1605 9 місяців тому

      Really ? They have an insulating wrap? What about after heating them up to remove the ink?

    • @bobhs1605
      @bobhs1605 9 місяців тому

      And would sanding them make a difference?

    • @sirsteamtrain7913
      @sirsteamtrain7913 7 місяців тому +1

      ​@bobhs1605 sanding them would remove the incredibly thin plastic coat they have on the inside.

  • @MidlifeRenaissanceMan
    @MidlifeRenaissanceMan 4 роки тому +1

    You’ll find that 20mm grey conduit slides nicely inside 25mm grey conduit.
    Orange conduit is a little thicker and so 25mm slides inside 32mm
    Using the 25mm grey conduit on my 3m wide 40m mag loop, I would blow holes with RF arcing in the conduit with as little as 30-40W

  • @rcpilothamradio4503
    @rcpilothamradio4503 4 роки тому +1

    Outstanding HB9DHH 73 from Rene

  • @sadunnakipoglu9471
    @sadunnakipoglu9471 8 місяців тому

    Thank you so much for this video.

  • @DomeArmin
    @DomeArmin 4 місяці тому

    only from 5pF to 24pF

    I wanted to build an AM loop antenna -- but this method is not enough with it's insufficient super-tiny capacitance. 🙁

  • @paulromsky9527
    @paulromsky9527 4 місяці тому

    I am in the States. Can I use Aluminum? We can't buy Aluminium here.

  • @michaeljoshuamanallo1742
    @michaeljoshuamanallo1742 2 роки тому +1

    I made a small one just a fingers size and it has capacitance of 30 to 100 pf

  • @Esteban_Pascazzi_LU8ATK
    @Esteban_Pascazzi_LU8ATK 4 роки тому +2

    For loop your yellow copper wire is very resistive loosy....replace a copper wire with copper tape or aluminium foil....remember 10 cm this copper wire degrade eficience in your loop antena....sorry my english is very bad

  • @souptiksamanta
    @souptiksamanta 9 місяців тому

    Thanks❤❤

  • @markg6jvy135
    @markg6jvy135 4 роки тому +1

    👍👏👏