Hi All,
like many I experienced splatty distortion and awful fizzy decay in my Cherrybomb build. After making damn sure all the circuit was ok, all solderjoints ok I tryed several different transistors with hfe readings ranging from 50 to 300. Many different sounds and gain levels, but the splat never went away even al I installed trimpots on the collectors and biased every transistor right. I was very frustrated!
So yesterday, while poking the circuit with my DMM for the hundredst time, it occured to me that C9 had more voltage on it's negative than it's positive side. So I flipped it around and - Viola: Splat is gone!!!
I checked various schematics floating on the net and the original looking ones have that elcap facing positive to Q3s collector. Seems that Brian has that wrong here.
I hope this helps some other builders.
Greetings,
Timo
like many I experienced splatty distortion and awful fizzy decay in my Cherrybomb build. After making damn sure all the circuit was ok, all solderjoints ok I tryed several different transistors with hfe readings ranging from 50 to 300. Many different sounds and gain levels, but the splat never went away even al I installed trimpots on the collectors and biased every transistor right. I was very frustrated!
So yesterday, while poking the circuit with my DMM for the hundredst time, it occured to me that C9 had more voltage on it's negative than it's positive side. So I flipped it around and - Viola: Splat is gone!!!
I checked various schematics floating on the net and the original looking ones have that elcap facing positive to Q3s collector. Seems that Brian has that wrong here.
I hope this helps some other builders.
Greetings,
Timo