Well folks, hit a dead end. After some 3-4 hours the transformer suddenly cut out. I assume that the overload circuit was activated.
I am not giving up yet; I'm going to get rid of that hum!
Yes, indeed. Thanks for reminding. Set my gain 2 years ago to 10 and forgot about it.
Thanks, well at the moment I have like no time to listen to it. The MKIVSE may also need to burn in properly. Unfortunately, I don't have the MKIII any more around, so my comparisons any not very accurate. However, I did notice, the MKIVSE sounding more neutral, less "tubey" (less euphonic), a bit brighter, less coulored maybe. When I listened to the 6SN7GT, which sounded quite mellow but detailed before, they now sound like a better match with the HD800s, just more lively. On the other hand, the Tung Sol 5687WA sounded very niche on the MKIII, =, as in very vibrant, but on the MKIVSE, I was rather feeling that I would get a listening fatigue. The slightly darker Siemens 5687WB (supposedly relabelled Raytheon) were a better and good match now. This is all still prelimniary. The only other detail I think I can point is out is that the MKIVSE stage was wider and deeper.
We don't know how much the computer actually draws but I don't think it's safe. 120 V * 0.625 A = 75 VA which is quite a bit less than 420.
I guess so. Did it reset?