Aligning and optimizing various mechanical and electronic adjustments on a fully rebuilt, Ampex/ATR Services ATR-104 tape machine

Aligning or optimizing various mechanical and electronic adjustments on a fully rebuilt, Ampex/ATR Services ATR-104 tape machine. This ATR-104 can be outfitted with 1/4 inch or 1/2 inch heads and guides to accommodate several different tape track-configurations.