Home Forums GuitarPCB Build Support PUTB v2.b. Help (Solved) Reply To: PUTB v2.b. Help (Solved)


The change was purely cosmetic.

As Billy pointed out we do not recommend the Max1044 chip.

From the build doc: The charge pump you use must be compatible with the 7660/1044 pin layout. Some charge pumps have a frequency-boost feature which will increase the oscillator from the default 10kHz up to 35-45kHz. We recommend that you use a charge pump with this boost feature to avoid any whine or clock noise. We have seen a high failure rate with some manufacturers’ MAX1044 chips, so we prefer the 7660S (e.g.: TC7660SCPA). 

What is your current bias voltage set at for the collector of Q3?