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DIY Stompboxes => Building your own stompbox => Topic started by: whomeno on September 03, 2020, 08:22:58 AM

Title: Another ic big muff same problem help please
Post by: whomeno on September 03, 2020, 08:22:58 AM
I built a different ic big muff from here: http://tagboardeffects.blogspot.com/2012/01/ehx-ic-big-muff.html
every thing works as it should but, it has low volume. volume starts at mid pot and up.with sustain maxed. All the other big muffs I built had good volume. I probed and have good vol
through the 150nf bottom right corner to the 4.7k. after the 4.7k is where I lose it. I have went over every thing so many times, and don't see any thing wrong.I ready to pull my hair out if I had any.all resisters are metal film 1%. I want to Thank every one for all the help I have been given. I don't know what I would do with out you guys. I have learned a lot from here.
voltage is 9.03 at power jack
tl074
1 4.3
2 4.3
3 4.2
4 8.67
5 4.3
6 4.3
7 4.3
8 4.2
9 4.3
10 4.1
11 0
12 1.09
13 1.1
14 1.5



(https://i.postimg.cc/Fk5KWzTW/WIN-20200903-07-56-30-Pro.jpg) (https://postimg.cc/Fk5KWzTW)




(https://i.postimg.cc/BPBJmgLb/WIN-20200903-07-57-08-Pro.jpg) (https://postimg.cc/BPBJmgLb)
Title: Re: Another ic big muff same problem help please
Post by: 11-90-an on September 03, 2020, 08:56:04 AM
From Guitar FX Layouts...
D1 and D4 are 3 diodes in series...

(https://i.postimg.cc/zyh61kFG/F6-FD6163-2517-4-DD5-97-DA-B216-E7401619.jpg) (https://postimg.cc/zyh61kFG)

Plez check your copper vero connections... Some seem to have been scratched...
Title: Re: Another ic big muff same problem help please
Post by: whomeno on September 03, 2020, 09:14:33 AM
that was a sliver of board. trace not cut