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In Reply to: RE: Since we al are diyers.... posted by Garg0yle on August 27, 2015 at 13:26:36
I use a PC soundcard (M-Audio 192 PCI) and ARTA demo software. I also built a small interface box to ease the task of switching between channels and setting input levels. If you search the archives, you'll find a good amount of information on this.
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Buy Chinese. Bury freedom.
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I will look, it's a good thing I asked, I was just going to use some variable voltage sources and the scope.
Thanks.
Infamous sockpuppet
There have been quite a few posts by myself and member deathtube 667. We're both using the M-Audio card. At one time, I was shopping for an audio spectrum analyzer (HP) and distortion analyzer (Sound Technology), but then I tried this method. There are times when standalone test gear is more convenient, but I don't miss it in this case. I've dedicated a PC for this use, and the software lets me see everything I need to pick the best tubes from my stock. It also lets me optimize circuits in ways that would just be guesswork without it. IMO, there's no substitute for this capability.
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Buy Chinese. Bury freedom.
Right, I gotcha now.
I was thinking of just tracing curves, but you did mention distortion measurements.
That sounds even better, I will check it out.
Infamous sockpuppet
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