In stock counts A WHOLE LOT in my book.Īnother post will delve into the engineering of my prototype antenna system and the coil requirements. Three strikes you say? Not so fast because at least you can order their products and, in my example, take delivery in just two days. As well stainless steel is quite a bit less conductive than other choices… noticeably so in things like inductors as this simulation of the WRC coil in a mobile 80m antenna with various conductors suggests… Figure 1 – Comparing antenna bandwidth vs.

Mobile: Some models include typical 3/8-24 mobile antenna interconnections.Īs many of you know, long and narrow inductors aren’t as efficient as fat and short designs.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.

Wolf river coils sb1000 tia