ShortBtwnHdset
100+ Head-Fier
Hi All! Picked up a used Line Magnetic LM-32 Tube DAC, and hoping to add some protective fuses to the main transformer. The DAC uses a 6X4 tube for the HV regulation, and my worry is red-plating. With the cover on, I would never know until main primary fuse blew, or magic smoke escaped! So I want to add some fuses.
The main transformer (small EI core) has multiple secondary's, a 6.3V for the rectifier tube, an HV 150V winding, a 12.6V for the 12aU7 tube heaters, and a center tapped 16V-0-16V. A second toroid transformer has a single 8V winding.
So first, what rails would you fuse? I imagine the 6.3V and 12.6 volt would be the most likely to fault/fail, right? Would you also protect the HV rail?
The 16V +- rails would likely power the analog side of things, and the 8V must be for the digital side, hence it being a separate transformer.
So how would you go about it? Any help would be greatly appreciated!
The main transformer (small EI core) has multiple secondary's, a 6.3V for the rectifier tube, an HV 150V winding, a 12.6V for the 12aU7 tube heaters, and a center tapped 16V-0-16V. A second toroid transformer has a single 8V winding.
So first, what rails would you fuse? I imagine the 6.3V and 12.6 volt would be the most likely to fault/fail, right? Would you also protect the HV rail?
The 16V +- rails would likely power the analog side of things, and the 8V must be for the digital side, hence it being a separate transformer.
So how would you go about it? Any help would be greatly appreciated!
