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Vintage tube amp Heathkit AA-71
Hey, I am hoping someone can help me find a schematic for this amp. also maybe a instruction manual. I got this thing at a garage sale a while ago it works pretty good but it doesn't have the volume I think it should there is a plug (un filled) on the front that is marked PRE_AMP POWER and i...- HeathkitAA71
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- Forum: DIY (Do-It-Yourself) Discussions