I have a classic chase DMM the delay time pot only works in the slap back settings once the pot is turned to about 7 or 8 0’clock the pedal completely cuts out. is there any way to fix this problem without installing a new pot?

Tbe Hum Debugger will only cut out noise that is related to 60 or 50 cycle hum from wall outlets. The noise in the DMM is a broadband white noise.

Do you only hear the noise when you play notes? The DMM has its own built-in noise suppression circuit and you really should only hear the white noise when you play notes and on each subsequent echo. If you are hearing white noise at all times then something may be wrong with your DMM, if you are only hearing the white noise when you play notes and on each subsequent echo then there may not be much more you can do. The Boss NS2 acts in a very similar fashion to the noise suppression in the DMM.