Awesome and again, thanks for the information. I just spoke to a guy who has a B&K Dyna Quik Model 650 Tube Tester for $180 for sale here locally. I'm going to check it out this weekend. I'm not sure if it will even be able to test any of the tubes i have on the fisher but it's at least worth a try. He has a few others I will look at too but this one seems to be the closest to what i might need. Has anyone used this particular brand and model, I wonder?