livingnote
Well-known member
[finally BP with positive news attached]
Hi guys,
so it's not the first time I'm getting asked to do the BPEQ, Barry Porter's NetEQ, and
now that I'm ahead of all my etchery stuff I have a whole week to get it nailed right.
History so far has been that I did a complete redraw of the board Barry made from his
Gerbers, as it stood he had basically had the design and then just did "a board", stating
that it was just a quick "get it so that it works" and "if anybody wants to improve it..."
So here I am and now that rerouting is done, solder pads are bigger, no hairline traces
etc., it's getting to nitty gritty details like - certain caps are 0.1 when they could be 0.1
and 0.2 footprints...yada...yada "generally make it highly DIY-able".
Now to get myself warmed up, at the same time I've been thinking of making a guitar
EQ to just "have one", so what better to test it on than captain Solo.
I went and reduced the schematic down to two bands and simple I/O and of course now
it gets tossed into the lab to get torn asunder (I mean, commented).
Interesting things I've noticed:
All caps are bipolar and the signal path ones are often huge (1000µ) - sense in that?
Input and output circuit are serious weaponry it would seem, if I read this right it's
the hunt for the last bit of CM at the input and at the output making it rock-solid
every which way, which is a principle that seems to go through the entire design.
Yeah...so now I'm off doing all the research and reading up, this thing just doesn't
stop fascinating me. I never knew him but wish I could have spoken to him when he
was still alive. I guess the best thing he could do was leave his work like this, in a
manner that is accessible for this here little DIY rat.
It's giving me a whole new mindset about putting serious design documents online
myself - like, you know - the Little Beast? What if I get hit by a car tomorrow?
Who will have anything from all the work I put into it since my first little tin-can
SSL compressor? Maybe I should post that thing as a complete build document
when I'm done. It came from the forum, after all...it should go back to the forum.
Or is the lurking sharktank just what it is and better be sane+careful?
Anyway, </digression>
Here is the schematic I did for the simplified unbal "guitar" version (values just blind for now):
Foolin' Around
Hi guys,
so it's not the first time I'm getting asked to do the BPEQ, Barry Porter's NetEQ, and
now that I'm ahead of all my etchery stuff I have a whole week to get it nailed right.
History so far has been that I did a complete redraw of the board Barry made from his
Gerbers, as it stood he had basically had the design and then just did "a board", stating
that it was just a quick "get it so that it works" and "if anybody wants to improve it..."
So here I am and now that rerouting is done, solder pads are bigger, no hairline traces
etc., it's getting to nitty gritty details like - certain caps are 0.1 when they could be 0.1
and 0.2 footprints...yada...yada "generally make it highly DIY-able".
Now to get myself warmed up, at the same time I've been thinking of making a guitar
EQ to just "have one", so what better to test it on than captain Solo.
I went and reduced the schematic down to two bands and simple I/O and of course now
it gets tossed into the lab to get torn asunder (I mean, commented).
Interesting things I've noticed:
All caps are bipolar and the signal path ones are often huge (1000µ) - sense in that?
Input and output circuit are serious weaponry it would seem, if I read this right it's
the hunt for the last bit of CM at the input and at the output making it rock-solid
every which way, which is a principle that seems to go through the entire design.
Yeah...so now I'm off doing all the research and reading up, this thing just doesn't
stop fascinating me. I never knew him but wish I could have spoken to him when he
was still alive. I guess the best thing he could do was leave his work like this, in a
manner that is accessible for this here little DIY rat.
It's giving me a whole new mindset about putting serious design documents online
myself - like, you know - the Little Beast? What if I get hit by a car tomorrow?
Who will have anything from all the work I put into it since my first little tin-can
SSL compressor? Maybe I should post that thing as a complete build document
when I'm done. It came from the forum, after all...it should go back to the forum.
Or is the lurking sharktank just what it is and better be sane+careful?
Anyway, </digression>
Here is the schematic I did for the simplified unbal "guitar" version (values just blind for now):
Foolin' Around