An old Soviet overdrive/distortion with some interesting features. The layout is modified and modernized to use three dual 8 pin op amps instead of 14 pin single op amps that was used in the original pedal.
Hi. I am interested in this and would like to make it happen. In the diagram you posted, (and in which i cannot visualize the value),there are a resistor and a capacitor from Vref to Ic1.
Hi.The 33k (L-20) resistor has to connect to PIN2-IC2.Between 1k (A2-5) and 220n (A6-C6) there is a resistor of 100k to ground.It as a great fuzzy sound.
This thing sounds great! The EQ knobs take a bit of getting used to but there are a LOT of sounds in this thing. I'll note: comparing this to the real thing, the Resonance wiring is backward (F1 should be Resonance 3, E21 should be Resonance 1+2). PCB Guitar Mania has it backwards, too. It does kinda make sense - like a Rat filter knob - but is much more intuitive reversed (also that's how it's done on the original). Especially when using sliders.
Hi. I am interested in this and would like to make it happen.
ReplyDeleteIn the diagram you posted, (and in which i cannot visualize the value),there are a resistor and a capacitor from Vref to Ic1.
Yeah, it isn't easy to see, had to enlarge and filter the image in Gimp. The resistor is 4,7k and the cap label "0,68 25V".
DeleteHi.The 33k (L-20) resistor has to connect to PIN2-IC2.Between 1k (A2-5) and 220n (A6-C6) there is a resistor of 100k to ground.It as a great fuzzy sound.
ReplyDeleteAh, I see. Will make these changes in a couple of days. Thanks for giving this one a try.
DeleteHi.Thank you.After these changes,you can declare it verified.
ReplyDeleteGreat! layout is now updated with corrected connection for the 33k resistor and added 100k resistor to ground before the output.
DeleteBuilt, works.
ReplyDeleteThis thing sounds great! The EQ knobs take a bit of getting used to but there are a LOT of sounds in this thing.
ReplyDeleteI'll note: comparing this to the real thing, the Resonance wiring is backward (F1 should be Resonance 3, E21 should be Resonance 1+2). PCB Guitar Mania has it backwards, too. It does kinda make sense - like a Rat filter knob - but is much more intuitive reversed (also that's how it's done on the original). Especially when using sliders.
Would you be willing to share the modernized schematic?
ReplyDelete