- The issue was not one of terminology, it's with understanding the circuit.
Yes, I think the idea of wanting to help people who come to this forum, get a deeper understanding of electronics, is good intended and noble,
However it must not come as a surprise that +70 % of people who'll come here for advice are guitarists and musicians that aren't usually well versed in electronics, even the slightest, but they probably
will be able to solder and troubleshoot diy kits and mods, even check for errors, without necessarily being able to understand why theres a 1uf cap in c11.
Personally I have neither the ambition or the time to learn the craft profoundly or for becoming able to make the necessary calculations and conclusions
What I'm hoping when i come here, is that someone, with the skills that I don't have, has already comme to same sonic conclusion as I, since 1981, and has come up with a solution to f ex the buffer.
I guess maybe installing a clickless true bypass might be simpler that redesigning the buffer circuit. (?)
As a musician who has also worked extensively in sound engineering, i do have a developed hearing.
I am also pretty sure that people who come up with classic designs, didn't just calculate but experimented, from overdriving the first cap in a fuzzface, with their ears as guide, they came up with solutions, that they since have developed emperical evidence, for which adapted solutions works sonically.
It would be strange if diy owners of Boss GE-7 havent already experimented with different type opamps and buffercircuit modifications and come to some sort of sonic conclusion.
If it doesn't matter at all / doesn't change the sound or responsiveness, to employ say a JCR 4580D, in this type of circuit, versus an Opa2134, then I'm perfectly happy with learning from the emperical and calculated experience of others, and go from there.
No need to reinvent the wheel.
And I am PRET-TY sure my approach to this is most common amongst visitors here so...
Why fight it ?
I have no idea if the IC5 is the buffer, but I read and was told the IC4 is part of the buffer
And that the IC 1 2 3 is the filters and that the filters amplify the signal by looping the signal through the opamp.
In my simple understanding of overdrive circuit, this could overdrive the opamp slightly if the opamp is an opamp that has little headroom.
But maybe there aren't anyone left here who dares talk about it.
Personally have no shame of being bad at something that my real job doesn't depend on, and I don't think anyone should be ashamed because they think what they think, about 4458 being popular for it's oerdriven sound and known from tubescreamer. Or what ever.
I'm thinking there's a sonic reason for Analogman using a 4580D that they also use in the KOT.
I saw some shootouts of overdriven opamps and 4580D overdriven was very ballanced frequencywise.
What actually concerns me most is the buffer, because you can't turn it off and it does change the sound and response significantly
The pedal sounds great when on ,doing what it's supposed to, but off it's too much of a difference, from not being in the chain.
Experimenting with différent opamps is less important
Either i modify for better buffer or true bypass or I move on and try another EQ pedal.
Maybe the Maxon GE601
The clips ive heard have some nice added caracter.
The idea of an EQ with some nice added "mojo"/ saturation/colouration, is also from the fact that I already have and use a completely transperant digital EQ in the Line6 M9
Have a good fight night [Tyson/Jake]
