Early steel frame BGW rack mount stereo amplifier. Appears to have been recapped and serviced at some point. A resistor is blown as shown in photos. If you have any information on this amplifier or know of a wiring diagram I would be interested in hearing from you.I had planned on keeping this however I have found a different amplifier for its intended location in my collection. Top cover is missing screws. The item "Very Rare Early BGW Professional Model 500R Rack Mount Amplifier New Caps As-Is" is in sale since Tuesday, July 13, 2021. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Amplifiers". The seller is "fbisteve" and is located in Wisconsin Dells, Wisconsin. This item can be shipped to United States, Canada, United Kingdom, China, Mexico, Germany, Japan, France, Australia, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.