Zombie chorus with anti tick mod 1590b layout?..

[deadastronaut]

busy busy busy bee.... have fun!..

yeah i 'll have to sub a few bits...might be interesting,  bright/dark..

some chorus pedals are to bright imo, so it may be for the better...

i'll probably end up with a trim on the out too to get proper unity..i do that to most pedals

[Perrow]

Found that my layout shows pin 3 of the 4046 connected to pin 6 of the 3007. The schematic has pins 3 & 4 of the 4046 connected to pin 6 of the 3007.

No dice.

[Scruffie]

Found that my layout shows pin 3 of the 4046 connected to pin 6 of the 3007. The schematic has pins 3 & 4 of the 4046 connected to pin 6 of the 3007.

No dice.

Any change in voltages? 3007 in or out?

[Perrow]

Found that my layout shows pin 3 of the 4046 connected to pin 6 of the 3007. The schematic has pins 3 & 4 of the 4046 connected to pin 6 of the 3007.

No dice.

Any change in voltages? 3007 in or out?

I'll get to them tonight, on my way to work now (I stole the time to solder those two legs together and test and right when I was done my girl came knocking on the door: "can you come in now, we've got things to do").

[deadastronaut]

come on, come on...

starting populating the smalley today,...wish me luck!..

[Perrow]

come on, come on...

starting populating the smalley today,...wish me luck!..

Good luck on that, I've got mine populated sans a cap and the off board wiring, hopefully get some time tonight to see how that works.

[deadastronaut]

?  what are those 2 empty pads in the middle for? rate led?

[Perrow]

I've wondered that myself 

[deadastronaut]

 

[Perrow]

They're there on the "original layout", I just copied. Monkey see, monkey do. They're just V+ (through that 47R that everything is powered through) and ground, I guess they're there for a led.

[deadastronaut]

yep i saw that on the original too...yeah led probably..

anyway just finished populating...need to add wires then the dreaded test!...i have had to sub quite a few values, but we'll see...

hopefully it'll be    rather than  

[Perrow]

hopefully it'll be    rather than  

Hope even more that it won't be like...

See how scared he is, hiding in the end of that long corridor (won't work if you're on Tapatalk).

[deadastronaut]

arghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh @#$%ing @#$% @#$%ing @#$%

got sound, no chorus, yet!...twiddled trim...here we go!..no fluctuation/lfo in voltages

mn3007 voltages

1  2.79
2  1.65
3  2.77
4  0.00
5  0.00
6  1.65
7  3.39
8  3.39

cd4047

1  2.76
2  0.60
3  1.33
4  2.79
5  2.79
6  2.79
7  0.59
8  0.00
9  0.00
10  1.64
11  1.65
12   0.00
13   2.76
14   2.79



top 072

1   1.30
2   8.08
3   3.52
4   0.00
5   2.47
6   1.93
7   8.11
8   8.73

bottom 072

1   4.36
2   4.36
3   4.26
4   0.00
5   4.35
6   4.37
7   4.37
8   8.73

[Scruffie]

Those are quite wrong... your 4047 & 3007 are both really low voltage... wrong value somewhere?

Look around Q3 on the Tonepad schematic, that 10k the right value? 3904 orientated properly?

[deadastronaut]

cheers scruffie..i'll double check em...

[deadastronaut]

hmm... all ok round Q3

the only subs i did were 39k's changed to 33k's...

150pf changed to 100pf...

12k's to 10k's

120k to 100k

180k to 220k


heres my Q'S..
Q3 3904
C  8.72
B  3.42
E  2.37

Q2  3904
C   8.72
B   8.72
E   0.00

Q1  2N3906
C  0.00
B   6.51
E   2.18

layout:
http://www.diystompboxes.com/smfforum/index.php?topic=97344.msg850174#msg850174

hmmm would a dodgy trim be the cause too?

[Scruffie]

Your voltages seem okay... apart from everything being low round the 4047/3007, it could be something pulling everything down... same with the 3007 removed?

Q3 should have near voltage on C,B & E.

[deadastronaut]

ok i took out the mn3007,

measured the ic socket pins

1   2.42
2   1.49
3   2.41
4   0.00
5   0.00
6   1.45
7   4.28
8   4.28

q3 with 3007 removed

c   8.58
b   3.36
e   2.43

[Scruffie]

And with the 4047 removed?

[deadastronaut]

4047 removed.  4047 pins

1  0.00
2  0.01
3  0.87
4  8.61
5  8.61
6  8.61
7  0.00
8  0.00
9  0.00
10  0.00
11  0.00
12   0.00
13   0.00
14   8.61


both the 4047 3007 removed  3007 pins

1  8.61
2  0.00
3  8.58
4  0.00
5  0.00
6  0.00
7  8.60
8  8.60

i put ic's back in, the trim isn't doing anything, should it?..at least a warble or something?....it may be a dodgy trim...maybe not!..hmmm