NewYorkDave
Well-known member
Hello. It's been a long time, hasn't it?
I'm pretty much out of the game now but it's come to my attention that some of the little circuits I drafted years ago are still being built and used by various musicians, engineers and hobbyists around the world. I find this most gratifying.
Some of you may remember one circuit that generated a lot of interest in its preliminary form but which I chose not to "publish" in the end because I had a notion to develop it into a commercial product. Instead, I put it away and forgot about it for five years. I've since come to realize that life is very short and much of its value comes from what we give of ourselves to the world - our love, our time, our help and concern for others, a thoughtfully-prepared meal, a song, a poem, or even an imperfect little circuit. With that in mind, I have returned to give my regards and one more humble contribution to this wonderful community of DIYers.
NYD-EQ1
Essentially, it's a stepped L-pad shunted by series-resonant circuits. Technically, there are "better" ways to build a passive equalizer (e.g., using constant-impedance bridged-T networks) and I don't claim there's anything particularly clever or elegant about this circuit, but it did fulfill my design goal of a usable 3-band passive equalizer with a minimum of parts. The prototype worked quite satisfactorily for me.
Really, the merits of a passive equalizer are highly debatable in this day and age but at the time of design, there was a lot of interest in such things and I was merely responding to that. I don't know if this is still the case; I haven't really kept up with things.
As with all my circuits, I offer this for non-commercial, hobbyist use only and reserve any and all commercial rights for myself. May it serve you well.
- Dave
I'm pretty much out of the game now but it's come to my attention that some of the little circuits I drafted years ago are still being built and used by various musicians, engineers and hobbyists around the world. I find this most gratifying.
Some of you may remember one circuit that generated a lot of interest in its preliminary form but which I chose not to "publish" in the end because I had a notion to develop it into a commercial product. Instead, I put it away and forgot about it for five years. I've since come to realize that life is very short and much of its value comes from what we give of ourselves to the world - our love, our time, our help and concern for others, a thoughtfully-prepared meal, a song, a poem, or even an imperfect little circuit. With that in mind, I have returned to give my regards and one more humble contribution to this wonderful community of DIYers.
NYD-EQ1
Essentially, it's a stepped L-pad shunted by series-resonant circuits. Technically, there are "better" ways to build a passive equalizer (e.g., using constant-impedance bridged-T networks) and I don't claim there's anything particularly clever or elegant about this circuit, but it did fulfill my design goal of a usable 3-band passive equalizer with a minimum of parts. The prototype worked quite satisfactorily for me.
Really, the merits of a passive equalizer are highly debatable in this day and age but at the time of design, there was a lot of interest in such things and I was merely responding to that. I don't know if this is still the case; I haven't really kept up with things.
As with all my circuits, I offer this for non-commercial, hobbyist use only and reserve any and all commercial rights for myself. May it serve you well.
- Dave