I found a Healthkit TT-1A tester a few years ago that had been recently restored by a shop that understood this device. I don't use it often enough but it's great and (relatively) easy to use. It will test *almost* any tube made through 1978, including DHT and Nuvistors. It's a bit of a cumbersome beast. The paper rolls are in good shape but I find it easier to lead digital files on my laptop or access from a tablet.
Anyone Here Ever Purchased A Tube Tester?
Once or twice a day a tube sputters for a brief second in my Audio Research Reference DAC. The Reference DAC is connected directly to my amplifier and it also serves as my preamp. Visually, all of the tubes look fine. Visually, I can’t tell which tube may be bad.
The tubes are: (4) 6H30, plus (1) 6550C and (1) 6H30 in power supply
Have any of you ever purchased a tube tester to test your tubes? If so, what tube tester are you using?