Messages

Can you please triple check those pin voltages on IC1?  Also, please check that your R40 is 33R and not 33K or some other (high) value.

That was it!!  I didn't have a 33R, so grabbed a 20R and a mislabeled 15K.  Thank you so much!!!!!!!  Chorus works great now!

Hello again- been tearing my hair out over this- gone over the board multiple times, was convinced that I might have bought some bunk chips from a Chinese ebayer, shelled out $11 to small bear for a legit MN3007, and still no luck.  Will pass a signal when engaged, but no chorus effect through whole sweep of trimpot.  As always, help or guidance is much appreciated here's the debug stuff from diystompboxes:

1.What does it do, not do, and sound like?  will pass signal when engaged, though no chorus effect throughout sweep of trimpot
2.Name of the circuit = Madbean Pork Barrel, w/ MN3007/3101
3.Source of the circuit (URL of schematic or project) = http://www.madbeanpedals.com/projects/PorkBarrel/docs/PorkBarrel.pdf
4.Any modifications to the circuit? n
5.Any parts substitutions? If yes, list them. C10 8.2n, sub'd parallel 6.8 & 1.5 caps
6.Positive ground to negative ground conversion? no

IC1:

1: .01
2: 2.92
3: 0
4: 0
5: 2.9
6: 0.1
7: 2.9
8: 8.9

IC2:

1: ~
2: 4.49
3: ~
4: .01
5: 4.51
6: 4.51
7: 3.5
8: 9.04

IC3:

1: 1.39
2: 1.38
3: 0.01
4: 0.01
5: 0.1
6: 0.86
7: 0.01
8: 0.6

IC4:

1: 1.39
2: 0
3: 2.01
4: 0.1
5: 1.31
6: 1.31
7: 1.38
8: .01

Q1:

c: 9.04
b: 1.87
e: 2.86

Q2:

c: 9.04
b: 2.52
e: 2.24

Q3:

c: 9.03
b: ?
e: 2.21

Q4:

c: .55
b: .58
e: .01

Q5:

c: 1.38
b: 1.93
e: 0.1

D1:

a: .86
k: .55

D2:

a: .68
k: .86

D3:

a: 0
k: 9.04

I used an MN3007 that I got for way cheap from a Chinese ebayer. Thinking I might have got a bootleg chip- have a legit one coming from small bear, will try with that and report back. Thanks!!

I'm going to try it when I get home tonight. This is actually part of a multi fx project so theres no ground from the battery or dc jack, just the common ground and 9v coming from a PSU that's powering four other boards

Hello, finished my pork barrel last night and it will pass a signal but there's no chorus. Tried sweeping trimpot and no luck there. I grounded the board at the G pad between the in an out but not and the ground at the 9v- is it necessary to ground at both pads?

Thanks!!