Hi all,
I have a new Madbean Current Lover 2015 and the sweep didn't sound very "sweepy", so have got my multimeter out that is capable of frequency measurement and have the following at the *lowest* point of the Clock trim, ms times are worked out using "ms=stages/(freq in khz * 2)"
High: 620 khz = 0.82ms
Low: 170 khz = 3.01ms
These numbers go through the LM 311 Pin 7 and into the MN3007 Pins 2 and 6, and the low side freq of 170 khz seems a bit high, leading to a very narrow sweep of 0.82 - 3.01 ms.
With Filter matrix on I get even worse on the low end, but I know that the circuit LFO and "Filter/Matrix" are different
Range Fully CCW: 600 khz = 0.85 ms
Range Fully CW: 266 khz = 1.92 ms
I was expecting something more .8ms - 7ms or so, freqs 70khz - 600khz for a MN3007 1024 stage bbd
I also have a Boss HF-2 as well and that seems to operate "by the book", with sweeps from 40 - 500 khz so I know my multimeter is ok.
Voltages measured today with a 9.2v Battery, pdf figure is first, my figure is second. I have put a * next to the ones I think are "dodgy":
IC1 4558
1 4.59 4.46
2 4.59 4.47
3 4.18 4.05
4 0 0
5 4.51 4.38
6 4.55 0
7 4.53 4.42
8 9.13 8.87
IC2 MN3007
1 9.13 8.86
2 ~4.45 4.27
3 ~4.85 4.75
4 41mV 380mv *********
5 0
6 ~4.45 4.37
7 ~4.2 4.87
8 ~4.2 4.9
IC3 CD4049
1 9 8.8
2 4.5 4.38
3 4.5 4.38
4 4.5 4.38
5 4.53 4.38
6 4.5 4.35
7 4.5 4.36
8 0 0
9 4.5 4.36
10 4.5 4.36
11 4.5 4.36
12 4.5 4.36
13 ignore
14 4.5 4.28
15 4.5 4.33
16 ignore
IC4 CD4013
1 4.53 4.34
2 4.53 4.34
3 varies 4.7-5.3
4 0
5 4.5 4.35
6 0
7 0
8 0
9 0
10 0
11 0
12 9 0 ****** are these two a typo ?
13 0 8.75 ***** are these two a typo ?
14 9 8.75
IC5 LM324
1 varies 7.46
2 ~4.2 4.07
3 varies 4
4 9 8.69
5 0
6 0
7 7.8 0 ********** Looks very odd!
8 varies 2
9 varies 2
10 varies 2
11 0
12 ~4.2 3.9
13 ~4.2 3.9
14 varies 4
IC6 LM311
1 0 0
2 varies
3 varies
4 0 0
5 9.14 8.69
6 9.14 8.69
7 varies
8 9.14 8.69
IC7 4558
1 4.55 4.36
2 4.55 4.36
3 4.55 4.36
4 0
5 4.51 4.3
6 4.55 4.3
7 4.55 4.3
8 9.14 8.67
I have checked some components around those areas but all seem ok, I will continue to check values, but any guidance would be appreciated.
Thankyou
I have a new Madbean Current Lover 2015 and the sweep didn't sound very "sweepy", so have got my multimeter out that is capable of frequency measurement and have the following at the *lowest* point of the Clock trim, ms times are worked out using "ms=stages/(freq in khz * 2)"
High: 620 khz = 0.82ms
Low: 170 khz = 3.01ms
These numbers go through the LM 311 Pin 7 and into the MN3007 Pins 2 and 6, and the low side freq of 170 khz seems a bit high, leading to a very narrow sweep of 0.82 - 3.01 ms.
With Filter matrix on I get even worse on the low end, but I know that the circuit LFO and "Filter/Matrix" are different
Range Fully CCW: 600 khz = 0.85 ms
Range Fully CW: 266 khz = 1.92 ms
I was expecting something more .8ms - 7ms or so, freqs 70khz - 600khz for a MN3007 1024 stage bbd
I also have a Boss HF-2 as well and that seems to operate "by the book", with sweeps from 40 - 500 khz so I know my multimeter is ok.
Voltages measured today with a 9.2v Battery, pdf figure is first, my figure is second. I have put a * next to the ones I think are "dodgy":
IC1 4558
1 4.59 4.46
2 4.59 4.47
3 4.18 4.05
4 0 0
5 4.51 4.38
6 4.55 0
7 4.53 4.42
8 9.13 8.87
IC2 MN3007
1 9.13 8.86
2 ~4.45 4.27
3 ~4.85 4.75
4 41mV 380mv *********
5 0
6 ~4.45 4.37
7 ~4.2 4.87
8 ~4.2 4.9
IC3 CD4049
1 9 8.8
2 4.5 4.38
3 4.5 4.38
4 4.5 4.38
5 4.53 4.38
6 4.5 4.35
7 4.5 4.36
8 0 0
9 4.5 4.36
10 4.5 4.36
11 4.5 4.36
12 4.5 4.36
13 ignore
14 4.5 4.28
15 4.5 4.33
16 ignore
IC4 CD4013
1 4.53 4.34
2 4.53 4.34
3 varies 4.7-5.3
4 0
5 4.5 4.35
6 0
7 0
8 0
9 0
10 0
11 0
12 9 0 ****** are these two a typo ?
13 0 8.75 ***** are these two a typo ?
14 9 8.75
IC5 LM324
1 varies 7.46
2 ~4.2 4.07
3 varies 4
4 9 8.69
5 0
6 0
7 7.8 0 ********** Looks very odd!
8 varies 2
9 varies 2
10 varies 2
11 0
12 ~4.2 3.9
13 ~4.2 3.9
14 varies 4
IC6 LM311
1 0 0
2 varies
3 varies
4 0 0
5 9.14 8.69
6 9.14 8.69
7 varies
8 9.14 8.69
IC7 4558
1 4.55 4.36
2 4.55 4.36
3 4.55 4.36
4 0
5 4.51 4.3
6 4.55 4.3
7 4.55 4.3
8 9.14 8.67
I have checked some components around those areas but all seem ok, I will continue to check values, but any guidance would be appreciated.
Thankyou