- Joined Oct 10, 2019
Hi folks, I am working on building a vacuum tube tester. I am somewhat new to tubes but am gaining a lot of knowledge by reading books, forums, etc. I already have the short circuit tester designed and built. I have the high voltage power supply designed and most parts received. What I need a little help with is designing a circuit that will measure tube output power and comparing it to the tube data sheet values. I am working on the design of this circuit now and will post a schematic of it once I am done. I would like to know your thoughts, suggestions and any ideas to let me know if I am going down the right path or if I am heading into uncharted territory. I do not want to buy a vintage tube tester nor do I want to buy a current commercial tube tester. That won't educate me on any of the things I want to learn by building this unit. I don't want to plot power curves or anything fancy like that. I just would like to test audio preamp 12AX7, etc and power tubes 6L6GC, etc at their rated output and see if they are close +/- 20% to the published values in their data sheets.