This is a unique 1:1 transmission line transformer intended to provide highest possible isolation between input and output. Consequently there is no direct electrical connection between the input and output with all RF energy being conducted through the massive iron powder core. This makes the FCP antenna very quiet while also providing the required inductance for matching to the folded counterpoise.
This transformer is intended for use only with the FCP antenna design.
Specifications meet the K2AV FCP Isolation Transformer requirements used with his Folded Counterpoise for 160 or 80 meters.
Use this link to Guy’s (K2AV) very informative website for additional construction information.