DMM + 25hz Sine Wave + 50hz Sine Wave + 75hz Sine Wave.
Turn volume up to 3/4 volume with all settings flat then turn your LPF and SSF all the up/all the way down then play a 50hz tone and set the voltage to 45v. Then put in the 25hz since wave and turn the LFP up until the voltage stops dropping. Then do the same with SSF but turn it down.