Re: Kchibo antenna experiments installment 2
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Another possible problem could be capacitance from the close winding. I'd use a couple dowels on each side woven through the wires alternating over and under to help offset it. It also helps tighten up the windings and might improve the Q. You can get more effect by using Popsicle sticks or tongue depressors to get bigger swings if your turns are loose enough. On a big loop I've used pieces cut from wooden blinds as my stationary shuttles.
You could even use a turn or two of the unused wire on the other end as your pickup loop, adjusting there for best output as well. Signal shouldn't be a problem on a loop that large.
If you have enough turns you could put two coils in parallel tuned by the same cap the way they do with some of those ferrite loops.
It might look like a Frankenstein device but could be a nice compromise.
On Mar 18, 2015, at 12:43 PM, farmerik@... [ultralightdx] <ultralightdx@...> wrote: