For your consideration, an original 1960's vintage low voltage (heater supply) selenium rectifier for the Marantz Model 7 tube preamp. Exact OEM drop in replacement. This selenium rectifier was made in USA by International Rectifier in El Segundo, California. Comes with it's original box.It has been tested in actual Marantz Model 7, and producing a strong 26.7V DC before filtering and 18.8V DC after filtering. Near NOS performance!Don't settle for cheap foreign made imitations. This is the real deal!Thanks for looking and don't forget to check my other auctions for more Marantz 7 items!