Product line breadth: Some models are retrofit components for other commercial antennas.This trades efficiency for a sleek profile. Inductor topology: A general theme of long vs.Conductor: Stainless steel wire for the coil conductor inlaid into a shallow groove in the tubular form.Diameter: About 1.7 inches (~42 mm) diameter.Wolf River Coils specializes in relatively narrow coils for HF use with the following attributes. Fortunately I found Wolf River Coils (WRC). I missed the ball with the BugCatcher series of well designed coils proportioned to maximize efficiency. Unfortunately the supply of coils suitable for an HF mobile center loaded antenna assembly are few and far between. I try to design assemblies with off the shelf products so others might try the concept with relative ease. While working on a new HF mobile antenna concept, I reached the point to profile some loading coil concepts.
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