Got a question about biasing my Soul-O 45 after replacing the existing Mesa 6l6s with GT 6l6Bs. Here is a copy of an email I sent to GT which has not been answered yet. Any help will be appreciated. Here it is: <<Hi, I'll get straight to the point. I own a Soul-O 45. The 6l6s recently went out on me. I replaced with a slightly used set of GT 6l6Bs I had sitting around the house. I have a copy of a tech service bulletin (mid to late 90s apparently) that describes how to attach a DVM to the second speaker jack and measure current draw on both output tubes. I did this and was reading around 29 mv on both tubes. I goofed around with the bias pot and ended setting current draw around 35 mv. What I need to know is what are the current draw parameters for this amp and these output tubes? I don't want to under or over bias the amp and cause problems later. Also, any charts or other documents that could guide me with respect to other output tubes or amps would be appreciated. Thanks for your time.>> EDIT: the GT tubes are rated with a number 7 on a sticker attached to the tube base. "Test 7, Rate IBL".