Hi, i am new to the Forum. I'am french, fond of tube amplifiers, and electronics / automation Engineer, living in France. My question is : a friend brought me a Carbon bought from USA, and arrived in bad condition. I succeeded to repair it and it functionned 2 days when he brought it back home. Then suddenly the left Channel started to distord hardly and it continues even at starting up in cold condition. I think about a dry solder. Any help appreciated ! Here is a pic, can you help me identify the model and find the schematics ? Cheers !