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Hi.

Finally got my cherrybomb to work after some frustrating debugging sessions, but it doesn't work quite as I expected. Turns out that the bass and treble controls have minimal - if any- effect on the sound, and the volume is lower than I'd expect  (unity at around Vol: 50% with Gain at 25%). I also occasionally get French radio, but this is probably due to the fact that I haven't grounded the enclosure yet. Voltages are off (see below).

Battery: 8.84V

Q1:
E: 0.38V
B: 0.93V
C: 1.92V

Q2:
E: 1.29V
B: 1.93V
C: 3.84V

Q3:
E: 0.0V
B: 1.53V
C: 8.80V

The first problem I had with this was probably due to a faulty PCB. There is 470 Ohms of resistance to ground from the emitter of Q3, as it should be, so it's not shorted to ground.

Any ideas of "suspects" is greatly appreciated

Hi.

Cherrybomb, Madbean PCB, no sound when engaged, checked for solder bridges/cold joints.

Built a Cherrybomb last night, and have not been able to make it work. The voltages are way off (see below), and when I check for continuity, I find that the second leg of C1 is wide open to ground. I'm used to working on etched, single sided PCBs, where I can follow the tracks, but this is one of Madbeans PCBs, and I'm having a hard time figuring out which end of the component goes where.

Battery: 9.17V

Q1:
E: 0.15V
B: 0.0V
C: 8.18V

Q2:
E: 0.0V
B: 8.18V
C: 9.15V

Q3:
E: 0.86V
B: 1.47V
C: 5.76V

Any ideas? I'm starting to run out of them, so any help will be greatly appreciated. Thanks.

Hi.

I have been enjoying reading this forum for a while now, and am looking forward to build some of the projects on this site.

I'm on the brink of finishing the Pork Barrel, only to find that I have forgotten to order the required 8.2v zener diode (yup, I'm using the MN3207). Will a 9.1v zener diode work as a substitute, or will it result in a fried IC?

Thanks.