UTC CG-140 Transformer Audio Rare Vintage CG140 Home brew Tube Radio Amp. This is a little tube amp/radio type with UTC CG-140 Transformer. The item is small. Maybe 5 inches long. UTC CG-140 AUDIO TRANSFORMER – RARE VINTAGE COMPONENT. This is a rare vintage UTC CG-140 audio transformer, sought after for its quality construction and legendary sound characteristics. Ideal for vintage audio restoration, broadcast equipment repairs, or audiophile DIY projects. Vintage UTC CG-140 Transformer? High-quality USA-made component? Great for analog gear, tube amps, preamps, and broadcast audio? Known for warm, classic tone and reliable performance? Hard to find in this condition.