Cara Modif SOCL 504 Karakter Flat

***This modification is for a voltage of 60-80 vdc, the TR VAS ct is certainly hot, touched with a finger in 5 seconds it will definitely feel sweet, therefore it is necessary to install a HEATSHINK ***Before being modified, the 504 socl experienced oscillations and the gain was unstable, tending to fluctuate and then stabilized, when injected with 600 mv input at a frequency of 20Hz only 4.9 vac output 🤭 and strangely at a frequency of 50-100Hz it is too open in amplifying the signal so that the frequency disparity clips faster and the stable position is only at a frequency of 500Hz-20KHz the output can be even ***After a little modification, the gain is much more stable and the output can be even, the input is injected at 600 mv and the output can be consistently even from a frequency of 20Hz-20KHz and of course free from oscillation