I have a 1969 Sorado that is more mint clean than the 200s I bought new off the floor in the store back in 69. It has Magnavox 6550s. It is as quiet as it gets, clear and loud, and has no pboblems, except the boost switches (which I never use) both seem a very tiny bit loose, and make poor connections when using them. Do I have bad swithces or just in need of a spray of something. Also, I have a mint 1972, 190B with no rectifier tube or solid state rectifier visible. Is it hard wired under the chassis? And last, is there a bias adjuster and home technique I can play with? Thanks, Steve
