cerelac wrote:I built this Sadowsky schematic that was posted, but i dont think it sounds very good. Is it verified? As it is, has way too much gain, and the tone shaping is lame, can anyone confirm the validity of this? thanks
enakar wrote:- Moved the 500k log Level control to between the tonestack and the second amp stage
enakar wrote:cerelac wrote:I built this Sadowsky schematic that was posted, but i dont think it sounds very good. Is it verified? As it is, has way too much gain, and the tone shaping is lame, can anyone confirm the validity of this? thanks
Hi, check my earlier post about the mods i did.
cerelac wrote:Cool stuff, yeah i saw these mods, but even performing mods on it, i felt it crude, it still distorted, and the tonestack was still quite mild and uninspiring, also i found the jfets to add way too much his for my taste
the new preamp you build had the same in and out jfets? cheers
Victor Nery wrote:Greetings,
I always wanted to build a 3-band EQ but never had found such an easy project like the one posted above. Still I have one doubt about the lack of a capacitor in the end of the circuit. Is it necessary and what should be its value? The fact it‘s missing means we have to put another circuit after it such as a buffer? Does this circuit work with a single 9V battery and a voltage divider? It would be cool to implement this feature in the circuit.
Duckman wrote:Here you got a complete similar proyect, single rail version (easlily founded googling "3 band eq" )
Planned to use TL072 or NE5532, but remember that 072 is a FET and 5532 is a BJT, wich basically means, much higher input impedance with the 072 than the tipically 100k of the 5532.
enakar wrote:But how is this a single rail circuit?
Duckman wrote:enakar wrote:But how is this a single rail circuit?
Because you have +15v/0v instead of +15v/-15v, so your bias point is around 7.5v; your "swing" will be +/- 7.5v... if you go double rail, your bias point is around 0v, hence, your "swing" will be +/-15v, just the double of headroom.
Any way, you can run it @ 9v with a 4.5v bias point without problem; just less headroom.
Duckman wrote:That's exactly what they do, but @ 15v. Just change it to 9v and that´s it.
I forgot to say "click in the single supply version link", sorry, my fault.
bajaman wrote:has anyone traced the opamp 3 band preamp fitted in the Fender Deluxe jazz or Precision basses
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