AC10 power transformer made for me by Heyboer To original specs except the 115V primary is changed to 120V. Same color codes as the original. Same size. the wires come out on the bottom and the top end bell as on the originals. Like all of the AC10 power transformers available today from the current popular transformer manufacturers these have a four bolt mounting (most of the original vintage ones are two bolt). mounting center are 3 1/8 x 2 3/8”.