Hello all,
just soldered up my first Madbean circuit and having some issues.
1) Cavedweller 2015 Edition on a PCB purchased from the MBP store.
2) I hear clean guitar and when I jostle the circuit a bit I hear the echo of the circuit noise, never an echo of the guitar. When I change the controls it does effect the delay / feedback / mix - but only of the 'circuit noise' and not of the guitar.
With the audio probe I can track the guitar up to Pin 14. Nothing on Pin 13.
3) I have done the following:
-Tried a different PT2399
-Triple-checked the polarity of electrolytics
-Tested voltages (below)
-Used an audio probe
-Visual inspection for crossed leads (best I could)
4) Substitutions:
-I accidentally ordered gigantic 100v caps, but I got them in there somehow.
-My voltage regulator is the L78L05
-I strappled a 20k and a 2k resistor in parallel to get the 18k resistor
5) Voltages
PT2399 Pins:
1 - 5.07
2 - 2.62
3 - .12
4 - .12
5 - .1
6 - 2.57
7 - (no reading on my cheap multimeter)
8 - fluctuates between 0 and 4.7v
9 - 13 All measure about 2.62
Transistor:
1.52 / 0.55 / 6.23
Voltage Regulator:
9.11 / .03 / 5.1
Photos attached. Please let me know what other info I could provide and thanks a lot for any suggestions.
just soldered up my first Madbean circuit and having some issues.
1) Cavedweller 2015 Edition on a PCB purchased from the MBP store.
2) I hear clean guitar and when I jostle the circuit a bit I hear the echo of the circuit noise, never an echo of the guitar. When I change the controls it does effect the delay / feedback / mix - but only of the 'circuit noise' and not of the guitar.
With the audio probe I can track the guitar up to Pin 14. Nothing on Pin 13.
3) I have done the following:
-Tried a different PT2399
-Triple-checked the polarity of electrolytics
-Tested voltages (below)
-Used an audio probe
-Visual inspection for crossed leads (best I could)
4) Substitutions:
-I accidentally ordered gigantic 100v caps, but I got them in there somehow.
-My voltage regulator is the L78L05
-I strappled a 20k and a 2k resistor in parallel to get the 18k resistor
5) Voltages
PT2399 Pins:
1 - 5.07
2 - 2.62
3 - .12
4 - .12
5 - .1
6 - 2.57
7 - (no reading on my cheap multimeter)
8 - fluctuates between 0 and 4.7v
9 - 13 All measure about 2.62
Transistor:
1.52 / 0.55 / 6.23
Voltage Regulator:
9.11 / .03 / 5.1
Photos attached. Please let me know what other info I could provide and thanks a lot for any suggestions.