Electronics on the floor: Another sliding variable capacitor
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- เผยแพร่เมื่อ 26 ส.ค. 2024
- Another sliding variable capacitor. Goes up to about 30pF.
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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.
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 !
Really ? They have an insulating wrap? What about after heating them up to remove the ink?
And would sanding them make a difference?
@bobhs1605 sanding them would remove the incredibly thin plastic coat they have on the inside.
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
Thank you so much for this video.
Outstanding HB9DHH 73 from Rene
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. 🙁
I am in the States. Can I use Aluminum? We can't buy Aluminium here.
Thanks❤❤
I made a small one just a fingers size and it has capacitance of 30 to 100 pf
How
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
👍👏👏