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Don't mean to rain on your parade

John, you are a way smart guy, and I enjoy your informative posts on this forum (I've learned a lot). I am also happy to see that you are delving into hollow state technology. There is no amplifying device more linear than a triode gain stage. Also, I can certainly relate to the joy of making things with your own hands. BTW, the Khozmo attenuators are a really great option.

Just keep in mind, that in spite of a lot of sales pitch, this may not be the end all be all approach to a "preamp". If I get this right, (haven't found a schematic although I've looked) I call this a line stage, preamps have phono stages. Even by line stage standards, this has an unnecessarily complicated attenuation scheme (looks like you've remedied that). This may also be cathode follower topology, as that is the only reason why I could figure it would need 2 6SN7s per channel. In my book, this may not be an "uncompromised design".

In spite of that, hope you're having fun, and enjoy it. Keep on trucking, DIY is big fun.

twystd

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