Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

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I agree - avoid bypasses like the plague

Posted by andy evans on July 7, 2015 at 15:26:32:
I spent a whole day at one point with a huge stack of capacitors, sitting on the carpet linking them up in various combinations. All possible combinations sounded worse than none, even though there was clearly an impedance mismatch which was far from ideal. At that point I gave up.

Soon after I discovered filament bias with the 26 tube I was using, and life just got better and better from that point, which is now quite a few years ago just after Thomas Meyer started telling us about his filament bias experiments. I built a 26 preamp with a LL1660 and filament bias, then the Coleman regs came out in their first version and it got better still, then several updates of the Coleman regs came out and here we are today. I now use the 4P1L in place of the 26.

Going back to cathode bypasses for me would be like living in a mud hut.