I don't see the how you load the SUT has anything to do with the power side. Has not even to do with some plate, its from grid to ground. Is there any low Ohm path you can find between B+ rail and signal ground that changes with that SUT secondary load resistor?First I connected the step-up without the 47K load resistor, sounds OK both channels so I soldered the two 47K load resistors, connected and a big sound happened and no sound in both channels, once revised the first DN2450 was literally broken.....
I remember that can't get 500V fuses and you recommend me to put two 250V 0,1A in series separate a couple of centimeters of course before the SSHV2, is OK?
They could be helpful, but if the event is so rapid and catastrophic I am afraid they will not be so fast to react. There is a weird reason to find why that happened first. Try the white+black+white/black on signal ground alternatively. Maybe something with the grounding created a mess.
Maybe a big oscillation happened, the SMICA cap went parallel to the SUT secondary inductance // to the 47K between grid and ground. Tank resonance circuit. (Parallel Resonance and Parallel RLC Resonant Circuit). What are the red and green thicker wires? Signal carriers to the input tube?
Ground connections
Black/white/white+black are simple shields that are not circuit related, I can't see why they should make a difference to the supply.
Jensen shows any as valid.
Attachments
- Home
- Source & Line
- Analogue Source
- Valve Itch phono