It does not need a transformer. The unit was used in a climate controlled professional recording studio. These is some rust on the chassis but that was there before I bought it and it has been throughly gone through Since then. This unit has increased in value ever year Ive owned it.
It has been used on some serious records and sounds amazing. The item "Telefunken V76 mic pre the real deal" is in sale since Thursday, February 27, 2020. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips". The seller is "jroystudios" and is located in Madisonville, Louisiana. This item can be shipped to United States.