I use 6H30 which i find to be more dominant(powerful) than the 6DJ8. Can we have a picture of or heater shielding?:)

there is some, just an "extra" bit, you should try it out, u can leave it on minimum on one channel and remove it completely on the other.   have u rolled any tubes?

I assume u removed nfb?

meaning construction or improvement ?:)

only thing i cn suspect is faulty mosfets , however just to be sure can you also mesure the ac output voltage of the transformer as well as dc voltage between tube pin 3 and ground. just have ur meter ready, turn on get a mesurement turn off. dont replace the burned resistor, it doesnt matter...

  can u put tome quality pics of both the back and the front of the psu boards?

You should not really be worried abt the mosfet being cooled. I have mine on the original position next to the tubes in an enclosure with little airflow and well they work fine. Stability is more abt "constant" heat than being cool ( assuming ur in the working temp range).   Any way, no if u...

Stupid me one of the heaters of the ecc99 was not connected...:@

Suddenly one channel stopped working:S   The problem is around the ecc99 circuit. Pin 1,2,3 of the ecc99 measure ~220v were pin 3 should have been ~120v. Pin 8 of the tube is at 0v instead of 2.2v. I changed the tube with a working one and still the same. Any idea which component might have...

if you got any high voltage diodes around you can use them instead of the ps tube:)

stupid me... cold connection on the heater pins. thanks for the idea :)

measured the the coupling caps (c3 c4) they are fine. also checked pin 1-2-3 and they are not shorted, any other thoughts?   also tried changing tubes. same problem

got another problem again. i left the amp for quite some time on and one of the channels stop working, i feared it was the tubes so i interchanged them and still got no sound. i measured pin 1 - 2 -3 of the 6dj8 and they were all the same voltage , 184v i panicked . any idea whats causing this

noticed that on one of my psus under load the maximum voltage i can get is ~245v  the other runs fine at 250v sharp. checked input capacitors they are fine   any idea what maybe causing this? can it be the transformer?

will check the tubes as soon as i go home, i thought that the extention cable of the tubes may picking up noise i moved the tubes around and i get no difference so i guess i can rule that out. i get noise / hum on the left channel ( balanced amp btw) which is not affected by changing the...