BLOVIATOR

[Guitafuzz]

  Hello Guys im frustrating with my bloviator project, the main issue is that i got the same result in bypass mode and with the effect is engaged , i take several voltages with out the ic,s and the pot's at 12 o'clock. The version of the PCB is dated 06/01/11 the single side pcb.

Wall adapter voltage 9.48v

IC1

1. -0.01
2. -0.0
3. 0.01
4. 0
5. 0.02
6. 0.01
7. 0.01
8. 8.45


IC2

1. nothing
2. 0.01
3. 0.01
4. 8.45
5. 0.02
6. 0.01
7. 0.01
8. 0
9. 0
10. 0
11. 0
12. 0
13. 0
14. 0


IC3

1. 0
2. 0.01
3. 4.37
4. 0
5. 0
6. 0
7. 0
8. 0

After this read i add the ic3 for check the voltages in "vB" im using a TL072 instead the TL071 (This could be the problem?)


VB Voltage in al the points was 1.32 - 1.27

Someone can help me

Thanks in Advance

[jimilee]

Check out the pinout for the 71 vs the 72, I believe they are different.


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[Guitafuzz]

  hey jimilee you are right the pinout is different, Will change the ic and check if can here a difference

[alanp]

71/72 pinouts are vastly different. That's a big part of your problem right there.

If you substitute a part, make sure to check the datasheet for both the original and your substitution, to check that the important stuff matches.