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RE: Best is to Incorporate Control into the Build (pics)

Here's the completed preamp.






The 9V battery applies grid bias to the 26. It is fed through the LL1676 input transformer secondary so that there is no need for a DC blocking cap in the grid circuit. It makes for a much cleaner sounding preamp; I tried it with a cap first (Duelund CAST, no less) and it sounds better without it. Here's a schematic:






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