04-18-2014, 11:37 AM
Its pretty unusual for a filament winding of the transformer to go bad. Did you measure continuity with the 80 tube installed in the socket or was it removed. If you measured with the tube installed, the continuity reading could have been caused by the tube filament itself.
Check the solder connections from the filament winding wires to the tube socket terminals. A bad connection could cause the problem. There could also be a bad connection inside the transformer from the filament winding to the leads.
If all else fails, you could probably use a solid state replacement for the 80, which requires no filament voltage.
Check the solder connections from the filament winding wires to the tube socket terminals. A bad connection could cause the problem. There could also be a bad connection inside the transformer from the filament winding to the leads.
If all else fails, you could probably use a solid state replacement for the 80, which requires no filament voltage.
