Mooer - Grey Faze / Tomsline - G-fuzz

Bernardduur · Post by **Bernardduur** » 03 Nov 2023, 21:37

I got this pedal and LOVE it!!

Great fuzz face-ish sounds with two 2N404 transistors

For pics check my Blog / Instagram

Manfred · Post by **Manfred** » 04 Nov 2023, 09:28

Thanks for sharing.
Can you please measure the following voltage values.
At the base of Q1.
At the emitter of Q2
At the connection point between R4 and R7.

Ichabod_Crane · Post by **Ichabod_Crane** » 05 Nov 2023, 09:38

All that power supply circuit, the 1044... to get 7.0v?

FiveseveN · Post by **FiveseveN** » 05 Nov 2023, 09:53

MINUS 7V, so one can use the PNP setup without all the "positive ground" caveats.

Ichabod_Crane · Post by **Ichabod_Crane** » 06 Nov 2023, 08:07

Thanks.
And is FB2 ferrite? Is that what drop the voltage?

mauman · Post by **mauman** » 06 Nov 2023, 13:15

R3 (100R) and R2 (1k) make a voltage divider for the -V DC bus. If the pin 5 output of the 1044 charge pump is around -8V, this divider would drop it to around -7.2V. A ferrite bead's typical DC resistance is less than 1 ohm, so FB2 doesn't have much effect on DC voltage, it's meant to help filter AC noise.

Bernardduur · Post by **Bernardduur** » 14 Nov 2023, 09:08

Manfred wrote: ↑04 Nov 2023, 09:28 Thanks for sharing.
Can you please measure the following voltage values.
At the base of Q1.
At the emitter of Q2
At the connection point between R4 and R7.

I'll measure it tonight

Bernardduur · Post by **Bernardduur** » 16 Nov 2023, 20:57

All measurements in the case and with all controls to full

Manfred · Post by **Manfred** » 16 Nov 2023, 21:36

Hi Bernardduur.
thanks for reading the voltage values.

dmc777 · Post by **dmc777** » 24 Nov 2023, 14:52

That’s nice to know. Kinda sounds like a toss up as to whether you’re going to get one biased correctly though. How do they sound compared to a Tonebender MK1.5? I still use my old Smitty Pedals “Smitty Bender” mk1.5 with OC75s. I’ll never sell it but I do need a new fuzz face.