10-25-2011, 09:15 AM
Under strong pressure to complete a Philco 19, I easily swapped a dud 36 tetrode in a charred tube socket to a 6SJ7 and a new porcelain socket. The only wiring change was the grounding of the suppressor grid. I didn't have any spare 36's or 77's at the moment. At some time in the future the owner may want it converted back to a 36 tube but until then the radio works fine on both bands.
Pete AI2V