- Jan 21, 2012
- Reaction score
I have a TV-7 and a 6000a that I haven't used in years. I'm now getting back to testing a bunch of tubes. I found a pair of vintage 6ca7 tubes that could be very valuable if they tested well. I whipped out the 6000a. I read the instructions and everything. I plugged in the tube and pressed test. The needle moved up and down and wouldn't give a reading. Damn!!!!! I whipped out the TV-7 and tried again. I had to go on the web to relearn how to line test. Set all the knobs and let her rip. The needle worked!!!! The min. reading is 32. The tube is in the high 40's. That's a very good reading. I actually like using the TV-7. I'll deal with the 6000a later. I'm just getting started. They are GE.