@marshmellow As long as C10 is in the Vref net, there's no big difference. Check the pics in page 1 of this thread.bugg wrote:I won't argue that it should be, but I'm fairly certain that it wasn't.marshmellow wrote:C10 should be at the junction of R8/R9, not at the opamp output.
JHS - Angry Charlie V3 (3 band eq) [traced]
- Duckman
- Opamp Operator
- marshmellow
- Cap Cooler
Placing a capacitor of that size on an opamp output is just wrong, regardless of what the "designer" of the pedal did.Duckman wrote:@marshmellow As long as C10 is in the Vref net, there's no big difference. Check the pics in page 1 of this thread.bugg wrote:I won't argue that it should be, but I'm fairly certain that it wasn't.marshmellow wrote:C10 should be at the junction of R8/R9, not at the opamp output.
http://www.analog.com/en/analog-dialogu ... er-25.html
Hi,bugg wrote:Traced from original, all SMD caps removed and measured.
Full schematic (and PCBs) available here:
http://www.pedalpcb.com/product/angrycharles/
thank you very much for your work. I noticed that R18 is 10k in the pedal guts shots at the beginning of this thread, so I think you should correct it in the schematic.
Cheers,
Giulio
Hi friends
I've made a clone of Angry charlie V3, its sounds amazing and have a nice and warm distortion but i think it has less treble, what is your recommendations for increasing about 30-40% treble to tone of this pedal.
https://www.pedalpcb.com/docs/AngryCharles.pdf
I've made a clone of Angry charlie V3, its sounds amazing and have a nice and warm distortion but i think it has less treble, what is your recommendations for increasing about 30-40% treble to tone of this pedal.
https://www.pedalpcb.com/docs/AngryCharles.pdf
- mauman
- Resistor Ronker
R19 (6.8k) and C17 (22n) at the output form a low-pass filter with a corner (-3 dB) at 1 kHz. Reduce the value of C17 to raise the corner frequency which will give you more treble. 10n = 2.3 kHz, 6.8n = 3.4 kHz, 4.7n = 5 kHz, etc.
Is decreasing C7 (100p) is beneficial for increasing treble?
- mauman
- Resistor Ronker
This three-band Baxandall tone stack (copied from Douglas Self's Small Signal Audio Design book) will give you 12 dB of boost and cut in each band, which is quite a lot. The treble control works from 1k Hz up, and the mids are centered around 700 or 800 Hz. If you can't get enough treble by adjusting the mids and treble pots, I'd modify or even remove that output lowpass filter (R19/C17), which is killing your treble.