This is the forth of these simple singe stage valve (tube) preamps I have made. This one has been carefully designed and modeled to work with every 12Axx tube. True plug and play in a tube rolling way. Again PS and amp on the one cct. brd. built on vero-board (strip board).



Currently I am using an English made 12AT7 and I believe this is the best sounding build so far. Also from the switch at the front the cathode bypass cap can be switched in or out for additional gain.

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