1 results for vacuum circuit board found in 0.000 seconds

mc275 vacuum tube power amplifier updated design ... a patent for its unity-coupled output circuit and has been improving it ever since ... the revolutionary circuit design enabled the development of audio ... in 1961 and represented the pinnacle of vacuum tube technology commemorative versions ... been replaced with glass-epoxy printed circuit boards developed through computer-aided ... operational consistency additional circuit refinements enable use of the widest ...