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Thursday, November 20, 2008

All 7-pin Tube Based Phonostage

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

Low Voltage, All Tube, Guitar Amplifier for Headphones

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