I recapped my AB165 Bassman recently, and the more I play it, the more it seems like I'm not getting enough filtering. There's an ugly doubling, especially around A or notes that would have a strong A harmonic. The schematic calls for two 70uf/350V in series for 35uf/700V. 70uf/350V not available anymore so I put 2 80uf. Now, the interesting thing is the caps I removed from the first positions were 250uf, so I'm guessing this was a problem for the last guy? I'm going to try going up, but the amp is more or less stock, why would it need such a variation from the schematic. Just trying to improve my knowledge here.