This comprehensive digital manual provides detailed circuit diagrams for the Champion 845 Band III Converter. It covers various vehicle models and years, encompassing passenger cars, SUVs, and trucks. The manual delves into the intricacies of this self-contained converter, which transforms an incoming Band III signal to any channel on band I. It meticulously explains the permeability tuning method utilized in the circuit, which incorporates a PCC84 cascode RF amplifier. The manual offers a comprehensive understanding of the Champion 845 Band III Converter's operation, enabling users to effectively diagnose and troubleshoot any potential issues.