how to make better!

[Joe]

What are the factors that I can change to improve any coils performance?

[kt315]

BASKET TYPE COIL

Joe, did you hear about BASKET TYPE COIL?
it BEATS all coils' types! i do it now...

this article gives some view on that.
http://kt315.hotbox.ru/bascoil2.gif

only take a fiberboard, round it, split edge on the sectors ODD numbered and wind the coil STRICTLY ON THE CARCASS. you can do also a some interval between loops (!) and Q would be more better.

[Joe]

Re: BASKET TYPE COIL

Can you check that address, I can't find anything!

[Allan]

Re: BASKET TYPE COIL

Site worked for me. Just highlighted it and dragged it into Google. It's a flat coil woven around in a spiral like a 1930 radio coil. However that has given me an idea,before I saw it I was imagining a cylindrical coil woven like the SIDE of a basket.Great way to get the capacitance down on a PI coil. Just a idea.Dont know if the wandering weave would upset the field.What do you think Carl or Reg.
Cheers, Allan.

[Reg]

Re: BASKET TYPE COIL

Hi Allan,

I have not tried the basket type coil so I can't say what for sure just what advantage or disadvantage such a design might provide.

If I had to guess, I wouldn't expect the weaving to make much if any change to the general field of the coil.

I might try one in the future but I will probably lose most of any benefits simply because I will ultimately "bunch" the windings together so I can shield them. However, I will probably use some soft spacing material like tape between the top and bottom part of the weave just to try to maintain the advantage to such a design.

I guess the best way to find out for sure is to simply try one. If I do, I won't use something very thick to weave on. That way I can still keep the coil thickness small.

Reg

[Eric Foster]

Re: BASKET TYPE COIL

Hi Reg,

I tried a basket winding on a PI once. This certainly reduced the winding capacitance. I made it by having a plastic ring with pegs equally spaced all round the circumference. The coil is wound be going under and over each peg in turn. Using an odd number of pegs ensures that each turn crosses over the previous one.

Eric.

[Frank Wallis]

Re: BASKET TYPE COIL

Hi Eric
Would say that this type of winding would have less capacitance than the mobius method

Regards Frank Wallis