SOLVED Sunflower Fuzz charge pump issue?

[Quirkey]

Hello!

I thought I'd start back with a relatively easy build but this one has me stumped! I have a sunflower fuzz that works fine for bypass but no sound when engaged. At first I thought it might be the transistors or the bias, but when I tried probing with my multimeter I realized I seem to be getting the wrong values out of the TC1044:

1 - 9.4
2 - 9.4
3 - 8.3
4 - 8.4
5 - 0
6 - 7.4
7 - 8.3
8 - 9.4

Reading the schematic, pin 5 should be -9.4 right? Thats how it powers the PNP transistors ...

I tried swapping ICs but that doesn't seem to be the issue AFAICT

Any ideas are appreciated!

 

[Quirkey]

Ok! Took a break from this but after dealing with some charge pump issues on a different circuit I came back. After studying the schematic it looked like the big problem was that pin 3 on the pump was not ground. I took the socket out and replaced it and viola! Ground and the pump worked. Now I just need to tune the transistors for it.

 

[2n404a]

I apologize for resurrecting this thread but do you know if the 1054 charge pump, sold on ppcb, will work as a drop in replacement for the 1044 that's recommended? I've been searching for an answer but yours seems to be the only post I can find that deals with the sunflower fuzz charge pump. This will be my first time building a pedal with a pump so I'm not too familiar with them. Thanks!

 

[neiltheseal]

I apologize for resurrecting this thread but do you know if the 1054 charge pump, sold on ppcb, will work as a drop in replacement for the 1044 that's recommended? I've been searching for an answer but yours seems to be the only post I can find that deals with the sunflower fuzz charge pump. This will be my first time building a pedal with a pump so I'm not too familiar with them. Thanks!

It depends on the circuit you are using but I use a 1054 and 1044 as essentially interchangeable parts.

There are some differences between them and I am sure there are circuits where they are not interchangeable, but I'm sure both will work in the sunflower.

The main difference is that the 1044 needs pin 1 and 8 connected or else you get a horrible whine. You can do this pretty easily though since they are next to each other. These are connected in the sunflower fuzz.

 

[2n404a]

It depends on the circuit you are using but I use a 1054 and 1044 as essentially interchangeable parts.

There are some differences between them and I am sure there are circuits where they are not interchangeable, but I'm sure both will work in the sunflower.

The main difference is that the 1044 needs pin 1 and 8 connected or else you get a horrible whine. You can do this pretty easily though since they are next to each other. These are connected in the sunflower fuzz.

Thanks! that makes life a little easier for the sunflower build