Ok, the distorsion problem is in the audio output section. This is the schematic...
http://img193.imageshack.us/img193/8648/audiowes.jpg
-C69, C1c, C73, C1d tested ok
-C72 and C74, I disconnect it but nothing changes
-R63 was bad, replaced but same results...
-C4 replaced
-6W6 is NOS
-R66, 67, 68, 69, 70 are ok
-R71 ok
-plate voltages ok
-Tried with another output transformer but nothing changes
-My set have a mica capacitor between R67 and the plate of 6T8/C72/R66, supposed for inverse reaction, I bypass it but same results...
I buyed a new 6T8 on evilbay, argh...
With a 2-3Vpp imput, distorsion starting at 10Vpp (2V/div)
Max volume, 25Vpp and 5V/div
If 6T8 is ok, I check the power supply capacitors...
