On 10/19/2023 2:02 PM, David Eckhardt wrote:
And further: No more than 3 or 4 non-overlapping turns through the
toroidal core.
Turns should be wound sequentially around the core(s). Photographic
examples and other details are on pages 22 and 23 of
http://k9yc.com/RFI-Ham.pdf
The filter of Fig 30 was added to the ARRL Handbook several years ago.
Although we built it for the generators we use for county expeditions,
it's universally applicable to HF.
73, Jim K9YC
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