[georgetownjohn]

Maybe this is starting to make some sense in my hard head.  Is this why the wire in question was not in the great Ron Ramirez video of 37-640 of the wires to disconnect the IF unit?  My 6A8 tube is a metal one and maybe his was glass.  Does all this mean that I could connect the wire in question to any ground point?  Perhaps my radio is a later production run since it also has aa Muter variable resistor for a bias instead of the large tubular Bias Resitor--Thanks John