Thursday, November 20, 2008
This began as a simple project to build a cheap phono stage for a very old turntable with a cheap cartridge out of parts on hand. However, it turned into a pretty good project that definitely outclasses the rest of my analog setup. Oh well, at least it was pretty cheap to build.
Thursday, May 1, 2008
I was browsing though some space charge tubes (these were tubes designed to operate at low voltages -- usually for car radios) recently and happened upon the 12K5 which is designated as a power output tetrode. I thought it might be useful for driving some headphones, and when I went looking, it turned out that others had been here before me.
Monday, March 17, 2008
I lived with my old single feed headphone amplifier, in one form or another, for a while. However, two events caused me to start rethinking the design.