I am having a problem with my Flabulanche pedal that recently put together. It is generating a consistent wooshing sound that is quite annoying. It not abundantly evident when the volume and gain are down, but it is there.
https://www.youtube.com/watch?v=Stc_iqgUMSI&list=LLvrkVZzl881pS6qpnJDkWAw&index=2&t=0s
I also, am not seeing any change in the Q3 values if I change the switch for the compressor.
Here is some data:
Before D2: 9.16v
After D2: 8.94v
Test Point 1: 11volts
Test Point 2: Bouncing around ALOT 1 to 11.24 volts
Test Point 3: 13
Q1
D 11
S 0.552
G 0 (lots of buzz when testing)
Q2
D 11.26
S 0.629
G 0
Q3 Comp. Switch left Q3 Comp. Center Q3 Comp. switch right
D 13.04 D 13.11 D 13.04
S 0.296 S 0.29 S 0.296
G 0.011 G 0 G 0.012
D1 switch left D1 center D1 switch right
3.18 0.17 3.25
Q4
D 10.71
S 3.63
G 1.50
I am not sure why the compressor circuit does not seem to be doing much to effect the Q3. Any ideas? Also, the annoying noise which seems to grow somewhat more complex as it is on longer. Is that an oscillating sound? Could this be the LT1054 chip? Transistor? Filter capacitor?
Thanks for your help,
Tyler
https://www.youtube.com/watch?v=Stc_iqgUMSI&list=LLvrkVZzl881pS6qpnJDkWAw&index=2&t=0s
I also, am not seeing any change in the Q3 values if I change the switch for the compressor.
Here is some data:
Before D2: 9.16v
After D2: 8.94v
Test Point 1: 11volts
Test Point 2: Bouncing around ALOT 1 to 11.24 volts
Test Point 3: 13
Q1
D 11
S 0.552
G 0 (lots of buzz when testing)
Q2
D 11.26
S 0.629
G 0
Q3 Comp. Switch left Q3 Comp. Center Q3 Comp. switch right
D 13.04 D 13.11 D 13.04
S 0.296 S 0.29 S 0.296
G 0.011 G 0 G 0.012
D1 switch left D1 center D1 switch right
3.18 0.17 3.25
Q4
D 10.71
S 3.63
G 1.50
I am not sure why the compressor circuit does not seem to be doing much to effect the Q3. Any ideas? Also, the annoying noise which seems to grow somewhat more complex as it is on longer. Is that an oscillating sound? Could this be the LT1054 chip? Transistor? Filter capacitor?
Thanks for your help,
Tyler