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Vacuum Tube Audio SP12 - 2019 buildthese photos document a recent 2019 build of an SP12 preamp![]() stuffed PCB ![]() bottom of PCB ![]() RCA jacks on rear panel ![]() ground buss wire added ![]() ![]() AC input wiring & power switch wiring ![]() front panel wired except selector switch ![]() selector switch wired ![]() closeup of master volume wiring ![]() finished front panel wiring ![]() finished rear panel wiring ![]() overview of interior
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