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RE: KBG-MN Incredible as coupling capacitor!!!

Usually bypassing caps is done if there is a roll off of highs, and the value is significantly lower than you propose (~.1uf). Also the K75-10s have a wonderful mid range, but they do roll off slightly in the highs, so don't know what you'd hope to accomplish with the k75. Of course you could always try it. I'd compare with 3 (better yet 4) of the 30uf MBGOs. Of course it would help if I knew if your amp runs full range or not. Even 3 MBGOs in parallel will probably still introduce some phase shift in the bass. Again working in a vacuum here.

To know the optimum value bypass cap it'd be nice to know your cathode resistor value, the operating points of the 2A3 (so I could refer to the plate curves to determine Rp), the impedance of your output transformer, and the lowest frequency your speakers can reproduce.

twystd


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