[Lowfer] Must have done something right

[Peter Barick]

Re: Vari Coil Idea

Here's a thought on minor variometer coils to approach a air-core former. Wood and sticks!

Shouldn't need many turns for a variometer so take some 1/4" plywood and place (glue) an odd number of wood pegs around its circumference, say 9-11. The coil is wound in basket-weave style. Likely the hardest part is mounting i within the main coil, if that's a concern. This could be a top mounted for mechnical ease. Of course some sealer should first be applied.

Peter
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>>> "J. B. Weazle McCreath" <weazle at hurontel.on.ca> 09/09/09 9:21 PM >>>
Hi Andy, Lowfers,
<...>
As to drilling holes in the coil forms for the variometer,
it does indeed make a difference.  The closer you can
come to an air-wound inductor the better.
<...>