b1 buffer preamp suitable voltage

No catastrophe here, except for the dining room

I have run mine with a single nine volt battery as an experiment, no catastrophe. I do run it at 18 volts, though, because that's what papa said to do. Here is a picture of the build, notice the empty Guiness and dinner in the crockpot. (This construction method is not recommended if your spouse is home).
 

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