Replace the (12) 100uf caps with black gate 16v 100uf standard capacitors (Michael Percy Audio). Make sure to keep track of the polarity, I just marked the board to show the positive side. Plug it in, let it burn for a couple of days and prepare to be astounded. Stan told me to replace the volume pots at the same time with very cheap 10k alps potentiometers. (3/8 inch shaft) The thing sounds great. For added thrills, replace the transformer with something larger, and replace the rectifier bridge with something larger (4amp) or hex-freds.
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