Explore the final installment of a five-part video series on repairing the Heathkit Visual Aural Signal Tracer model T-4. Delve into the process of troubleshooting and resolving complex issues, including some unexpected quirks that prove challenging to diagnose. Witness the culmination of the restoration effort as the fully repaired unit is put through its paces in a comprehensive test demonstration. Gain insights into vintage test equipment restoration techniques and the intricacies of working with Heathkit devices.