Easy Mid-scoop Control

[Bill Mountain]

I would only need one knob for a dual gang pot.  Are you thinking about a dual concentric?

[DavenPaget]

Following up a previous post , does anyone have an idea how to remove a chipped screw , it's so badly chipped my largest screwdriver can't handle it .

[Bill Mountain]

Try this:

http://www.wikihow.com/Remove-a-Stripped-Screw

[PereatMundus]

I would only need one knob for a dual gang pot.  Are you thinking about a dual concentric?

yeap yeap, I was thinking on other stuff there. My mistake.

[I'm a Swede, not a native English speaker. When I read "Dual" I thought about a pot where you'd use concentric knobs to control it independently.]

To me a Dual pot with locked levels of both shelves is called "stereo"-potentiometer, not "Dual"-potentiometer
"Dual"-pot > concentric independently controlled shelves
"Stereo"-Pot > locked equal level controlled *What would be used in this circuit*
"lost in translation" there

[deadastronaut]

@bill: i was thinking seperate pots......not concentric or dual..i don't like any dual knobs/pots..but hey thats just me i guess!......schemo?.....just to play with.....

[PereatMundus]

@bill: i was thinking seperate pots......not concentric or dual..i don't like any dual knobs/pots..but hey thats just me i guess!......schemo?.....just to play with.....

Isn't the point to have one regular 50k-10k pot for the scoop control.

and then instead of >Both< the 12k resistors have one. locked dual pot. Stereo pot.
and that would let you have 1pot for scoop and 1 pot for freq.

that was How I understood it anyway.

*just got lost in my own thoughts in the second to last post I did anyway.

Edit: for 2 pots for the 12k resistors (one for each) would be useless no? or?

[Bill Mountain]

@bill: i was thinking seperate pots......not concentric or dual..i don't like any dual knobs/pots..but hey thats just me i guess!......schemo?.....just to play with.....

Just 2 pots.  Frequency & Depth

I don't have time to do a schematic right now but just replace the 2 x 12k resistors with a dual gang 20k linear pot wired as two separate variable resistors.  Maybe put a 2.2k in series to set a minimum notch frequency.

I can draw something tonight and figure out some usable ranges for the variable notch frequency.

[PereatMundus]

@bill: i was thinking seperate pots......not concentric or dual..i don't like any dual knobs/pots..but hey thats just me i guess!......schemo?.....just to play with.....

Just 2 pots.  Frequency & Depth

I don't have time to do a schematic right now but just replace the 2 x 12k resistors with a dual gang 20k linear pot wired as two separate variable resistors.  Maybe put a 2.2k in series to set a minimum notch frequency.

I can draw something tonight and figure out some usable ranges for the variable notch frequency.

Good then I atleast understood you corretly, even though I completely messed up my part of the communication and got lost in other thoughts 

thanks again for your Idea, it seems VERY interesting..
...will have to go through boxxes tosee if I can't find parts for it at home after-all.
thanks

[deadastronaut]

no worries bill, i'll mess around tomorrow....no time today/night...

btw, does anyone know how to fix an oil sensor on a 1993 -000 skoda fabia 1.4...with really nice patterened seats?....ooopps wrong forium!!!!....

[Bill Mountain]

I meant to say that you should put a series resistor with the pots to keep the pots from shorting out but doing so will also allow you to set the max and min frequencies for the control.

I went to edit my post and it had already been quoted.  I should learn to proof read stuff before I post.

[deadastronaut]

ha ha...no worries...


edit: any skoda tips anyway?....

[Bill Mountain]

no worries bill, i'll mess around tomorrow....no time today/night...

btw, does anyone know how to fix an oil sensor on a 1993 -000 skoda fabia 1.4...with really nice patterened seats?....ooopps wrong forium!!!!....

Try Here:

http://briskoda.net/forums/

[deadastronaut]

lol...yeah i'm a member....i was only joking.....

[Bill Mountain]

lol...yeah i'm a member....i was only joking.....

So was I.

One of my other forums has requested that when making jokes you must put a  in order to keep from offending members lacking any ability to detect humor/sarcasm.

[deadastronaut]

 

[Ripdivot]

Hey Bill or Deadastronaut, how much insertion loss does this mid cut circuit have?

[Bill Mountain]

When I simulated it using http://www.falstad.com/afilter/ there was zero loss.  Also, when I put it after a buffer I couldn't hear any loss but when I plugged my passive bass straight in it seemed to dull the tone some which is probably due to the 6k input impedance that my guitar sees.

[sault]

It seems like a good compromise might be a push-pull pot, no?

http://www.bestbassgear.com/pots.htm

I mean, at least how its listed here a 25k DPDT push-pull is a 20$ purchase (!!!), but the benefit would be being able to switch between 12k and maybe the 4.7k mentioned earlier. Wiring should be pretty straightforward. It would certainly add to the versatility of the circuit... going from more of a rock/metal cut to more of a Big Muff/fuzz style cut, that is.

I like that idea instead of using two pots. Personal preference, I like wiring it all to the pot instead of using space on the circuit board. I'd also rather have a concentric knob rather than two, if I had to choose. Again, in the interest of saving space, more "bang for your buck", fewer knobs to clutter a pedal.... or freeing up a knob to do something else!

[Bill Mountain]

It seems like a good compromise might be a push-pull pot, no?

http://www.bestbassgear.com/pots.htm

I mean, at least how its listed here a 25k DPDT push-pull is a 20$ purchase (!!!), but the benefit would be being able to switch between 12k and maybe the 4.7k mentioned earlier. Wiring should be pretty straightforward. It would certainly add to the versatility of the circuit... going from more of a rock/metal cut to more of a Big Muff/fuzz style cut, that is.

I like that idea instead of using two pots. Personal preference, I like wiring it all to the pot instead of using space on the circuit board. I'd also rather have a concentric knob rather than two, if I had to choose. Again, in the interest of saving space, more "bang for your buck", fewer knobs to clutter a pedal.... or freeing up a knob to do something else!

Some one find a push/pull-concentric-with-a-single-10k-and-a-stereo-20k-pot.

[WGTP]

http://www.aronnelson.com/gallery/main.php/v/WGTP/Midrange+Madness.jpg.html

I've been messing with this one for several months.  It does all size notches from 300Hz to 1500Hz.