Current Lover Chirp

[CODymmoT]

Hi All,

I've just finished up a 2015 Current Lover and am having some issues calibrating it. I've listed my voltages below. All appear to be ball park to the build doc with the exception of IC5 LM324 Pin 7 and pins 12 & 13 on IC4 CD4013 appear to be backward ( Build doc is Pin 12 - 9v, Pin 13 - 0v. My reading are Pin 12 - 0v & Pin 13 - 8.75v. Any ways. I have calibrated it as per the document and have a really nice flange happening but for the life of me cannot get rid of the chirp at the extremes of the sweep. Any advice would be hugely appreciated. here are my Voltages

IC1
1 - 4.41
2 - 4.41
3 - 2.20
4 - 0
5 - 3.98
6 - 4.39
7 - 4.39
8 - 0

IC 2
1 - 8.79
2 - 4.35
3 - 3.79
4 - 0.13
5 - 0
6 - 4.35
7 - 4.35
8 - 0

IC3
1 - 8.79
2 - 4.36
3 - 4.36
4 - 4.36
5 - 4.36
6 - 4.36
7 - 4.36
8 - 0
9 -4.36
10 - 4.36
11 - 4.36
12 - 4.36
13 - 0
14 - 4.36
15 - 4.36
16 - 0

IC4

1 - 4.33
2 - 4.33
3 - Varies
4 - 0
5 - 4.36
6 - 0
7 - 0
8 - 0
9 - 0
10 - 0
11 - 0
12 - 0
13 - 8.75
14 - 8.79

IC5
1 - Varies
2 - 3.9
3 - Varies
4 - 8.7
5 - 0
6 - 0
7 - 0.02
8 - Varies
9 - Varies
10 - Varies
11 - 0
12 - 3.96
13 - 3.96
14 - Varies

IC6
1 - 0
2 - Varies
3 - Varies
4 - 0
5 - 8.79
6 - 8.79
7 - Varies
8 - 8.79

IC7
1 - 4.39
2 - 4.39
3 - 4.39
4 - 0
5 - 3.99
6 - 4.39
7 - 4.39
8 - 8.79

Thanks again in advance

TD