I’ve mostly completed the work, but just as I started to do some “safe” AC testing, I ran into issues (started seeing smoke from PT, and so immediately shut it down). Additionally, my mains/power switch seems to be backwards (ON is OFF/OFF is ON). Not sure about Standby switch.
Here’s the schematic and layout for my build and the power transformer.
I bring up the PT because I’m wondering if this amp is actually capable of working at 120VAC (or if it is 240VAC only)? I was told by someone previously it would work, and that moving some wires around was all that was needed, but based on the smoke signals I am second guessing everything.
Long-story short, here are my open questions or areas of need:
1. Is my PT capable of being wired for 120VAC? If so, how would I modify the layout to do this?
2. If not, would the Hammond 290PAZ be the direct swap?
3. And if I do need a different PT, and the Hammond above is workable: How would I re-wire things between the PT, Mains switch, Standby switch, Fuse holder, IEC, and Indicator lamp successfully?
A few other notes:
- The indicator lamp is a neon bulb and uses 120VAC, so that would have to be factored into the wiring plan.
- The Mains and Standby switches are DPST (2 terminals/lugs on “top” and 2 on “bottom,” depending how the switch is flipped or set). They look like these.
