KingSlayer 2 OD , strange noise with gain pot ???

[HOT TUBES 70]

I have built a few of these OD's and always had great luck with them , but i have one that has a very strange noise when the gain pot is tuned all the way down to zero , it sounds like someone tuning in an old ham radio etc .  You get alot of hiss , fuzz , and some crackling while the pot is in motion . But if you turn the gain pot up just slightly to about 15 - 20 % , the noise goes away ?

This noise happens with effected circuit , and bypass too .

I have replaced the gain pot with a new one 100KB dual  , and increase the R28 value to 150R , replaced the charge pump chip from a TC1044SCPA to a 7660SCPA , and the TLC274 chip with another new one .

The noise is still there .




Thanks for any help or ideas !!

[HOT TUBES 70]

Bump ...

[zilla]

necro bump.

i'm having the exact same issue.

D9E diodes, TL274 op amp, 1044scpa pump.