Author Topic: Zombie Problems  (Read 2142 times)

Seven64

Zombie Problems
« on: December 09, 2011, 05:39:49 PM »
I used the vero layout that can be found in the schematics section on the left side(in the post with 2 pics).

When the effect is engaged, it gives a really loud, distorted oscillation that has a speed and depth that changes with the pots.  also, the mod switch REALLY changes the sound, but i dunno how to describe it.  in one setting it is pretty mild and you can hear a little guitar thru it, the other setting its super loud and really distorted.

anywhoo, here are my voltages:

9v source: 9.71v

IC1 - TL062

1- 5.81
2- 5.81
3- 0.5
4- 0
5- 4.7
6- 5.4
7- 5.35
8- 9.71

IC2 - MN3007

1- 9.71
2- 4.82
3- 5.81
4- 0
5- 0
6- 4.81
7- 5.35
8- 5.36

IC3 - CD4046

1- 0
2-4.82
3-  4.81
4- 4.80
5- 0
6-1.02
7-0.99
8- 0
9- 3.6-4.1
10- cycling
11- cycling
12- 7.46
13- 0
14- 9.71
15- 0
16- 9.71

IC4 - TL062

1- 2.4-6.7 cycling
2- 4.35
3- 3.32-4.99 cycling
4- 0
5- 4.1-4.3 cycling
6- 1.05
7- 3.38-4.61 cycling
8- 9.72

any suggestions?

Seven64

Re: Zombie Problems
« Reply #1 on: December 11, 2011, 02:21:43 AM »
no love?

PRR

Re: Zombie Problems
« Reply #2 on: December 11, 2011, 08:07:21 PM »
> can be found in the schematics section on the left side

Better clue?
  • SUPPORTER

Seven64

Re: Zombie Problems
« Reply #3 on: December 11, 2011, 08:36:42 PM »

Seven64

Re: Zombie Problems
« Reply #4 on: December 11, 2011, 09:07:11 PM »
im retarded.  same problem i have had with the last 2 builds of mine.  i think i will remember it from now on.  i didn't ground the pcb to one of the jacks.  ran a ground from the pcb to a jack, and now it sounds great!  no tick issue either!  it has a lot of fuzz/feedback, but there are no transistors so i assume thats because it is not buffered or anything.  couple it with a noise supressor and i think it will be all good.

Seven64

Re: Zombie Problems
« Reply #5 on: December 12, 2011, 12:13:51 AM »
just wanna +1 this layout again.  I had to reverse the wires on the depth knob, as per this layout they had it backwards, but other than that i am lovin' this chorus.  I wanna build the PCB version of this next, as this perf layout is HUUUUGE. 

and i bought a pack of 10 mn3007's off of ebay hoping they wern't fakes or whatever, and i am assuming from this that they are legit. 

egasimus

Re: Zombie Problems
« Reply #6 on: December 12, 2011, 03:22:56 AM »
Just a thought - maybe the 3007s were fake and are the reason for the distortion and feedback? Either that, or something wrong with your wiring somewhere - buffered bypass has nothing to do with it.

Seven64

Re: Zombie Problems
« Reply #7 on: December 12, 2011, 08:32:10 PM »
i need to try and record the sound it makes.  i get it from alot of pedals i have built, like my orange squeezer on the madbean board.

egasimus

Re: Zombie Problems
« Reply #8 on: December 13, 2011, 03:10:23 AM »
Sounds like a bad power supply, then. Get a regulated PSU - cheapest way is to get a 12V unregulated and add a 7809+caps after it.