I create a incomplete layout copy according the guts here: viewtopic.php?f=1&t=2072&p=273581&hilit ... ne#p273581
There are missing component values and tracks, thus the schematic is incomplete too.
The circuit is a Silicone-Fuzzface clone.
I would be very grateful if anybody can fill in the missing values.
Here's my take on the circuit. If you include an additional 100pF from base to collector of Q2, it will sound very close to an old germanium Fuzz Face without the hiss!
Improved!
Remember - you need to use the lowest Hfe transistors you can find. I've had great success with medium power devices (BFY50 used to be a good choice) and the transistors inside the transistor array chips.
"Why is it humming?" "Because it doesn't know the words!"
mictester wrote:Here's my take on the circuit. If you include an additional 100pF from base to collector of Q2, it will sound very close to an old germanium Fuzz Face without the hiss!
BBE_WindowPainSchematic.jpg
Remember - you need to use the lowest Hfe transistors you can find. I've had great success with medium power devices (BFY50 used to be a good choice) and the transistors inside the transistor array chips.
Thanks for all the info. but please enlighten on the polarity of C8? "normally" the signal should pass through an electrolytic cap on the +/pos leg first then head "downstream" through the circuit from the -/neg leg of the cap. I've seen this a few times on various circuits here and there and wonder it is reversed (seemingly) in this circuit? Please help me to understand why this is? Thank you.
Thanks for all the info. but please enlighten on the polarity of C8? "normally" the signal should pass through an electrolytic cap on the +/pos leg first then head "downstream" through the circuit from the -/neg leg of the cap. I've seen this a few times on various circuits here and there and wonder it is reversed (seemingly) in this circuit? Please help me to understand why this is? Thank you.
If that's right then by the datasheet it seems you could use a selected MPSA11 as a sub.
"Just because the forgoing circuits have produced results there is no reason experimenting won't lead to added results." L. E. Darling, in his article containing the earliest published vacuum tube synthesizer circuit, Popular Science Jan 1920