RDV's Active 3 band page

[petemoore]

I can't find the thread, but it's from the schematic RDV drew, and posted. Thanks RDV ! ! ! [hope I'm not missing something]
 OK  ! ! !
 I got the snakey family tree working....would have been less snakey had I drawn a perf layout draft or two first...no matter...just a coulple components facing < way where the schematic has them in > that way...EZ nuff to read the board tho, just a note for anyone gearing up for a 3 knob Active EQ.
 SO...fired right up ! ! !
 After initial test, and seeing that the knobs work right...[I pondered CCW/CW action, turned out to be rightI put all the pots wirings in the 'same way, and it turns out CCW turns 'em 'up'...goodO !
 Then I played guitar>EQ>amp, and yes I'll be doing extensive testing on this, but I'm Already quite certain I should have built this 3 Band Active EQ.
 Has 'funny' resistor values, I just built them up from standard values...took my time and got them all within ~12%...and socketted the mid/treble caps, just for fun...first build of type, I like using 'extra' sockets.
 Works great, will be boxxing it up directly...well...
 1 question ... about a volume control ... the one addition I think would make this a wonderful pre/post Fuzz lead EQ/Boost...
 Having not put bypass on it yet, I'm wondering if a regular vol pot addition would still give just a touch of boost or would an added active stage be needed.
 Any experiences...seems like it boosts a bit....of course the knobs attenuate output.
 If not there's room on the board for a simple added stage W/ Vol.

[RDV]

I just added the voltage divider circuit(from GEOFEX). I modified the drawing that Zener had posted from the TL082 data sheet for use with a 9v single supply. I think there's some decent stuff in some of those datasheets, basic building block style circuits, though most have to be converted to single supply.

RDV

[RDV]

 1 question ... about a volume control ... the one addition I think would make this a wonderful pre/post Fuzz lead EQ/Boost...
 Having not put bypass on it yet, I'm wondering if a regular vol pot addition would still give just a touch of boost or would an added active stage be needed.
 Any experiences...seems like it boosts a bit....of course the knobs attenuate output.
 If not there's room on the board for a simple added stage W/ Vol.

I've not built this one Pete, but I'd try a bypass with it and see if it boosts or cuts. If it boosts, just tag a 100K volume on the end. If it cuts, slap a BMP volume recovery stage(or an LPB for that matter) and a 100K volume.

Have Fun

RDV

[petemoore]

Thanks for posting it.
 Should be a nice thing to have around.
 Yupp...volume control / N/P, I can slap a switch on there and decide whether I want 'more' enough to add a BM gain 'recovery' stage.
 U;n thinking about trying a 1 Meg after the first stage.