Magic Stick
For the alignment of coil L3 in the Barlow Wadley XCR-30 I had to compress and expand the windings.
To be sure not to overdo things some kind of tool should be a help .
The recollection of an article in the book Elements of Radio Servicing by Marcus and Levy (1955, page 437) gave me the idea to copy their example of a tuning stick.
Just a rod with a a brass and steel bolt at the ends and it worked remarkable well.
But I am still a little surprised that differences in two metals would give such a reaction to an electrical field.
Jard N.
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