Schematic help something is not quite right

[jimilee]

In the schematic, I've reversed the Volume pot, so it works backwards. No problem, I'll put a C taper in there and it will work fine. Nope, still works in reverse. Can someone help me figure out or know why?

TIA
-Jimi Lee

 

[Locrian99]

In the schematic, I've reversed the Volume pot, so it works backwards. No problem, I'll put a C taper in there and it will work fine. Nope, still works in reverse. Can someone help me figure out or know why?

TIA
-Jimi Lee

I’m just wanting to understand how a different taper would matter on it working in reverse. I’m assuming you mean fully ccw is max volume? Not saying you’re wrong it just doesn’t make sense to me, and I’d like to know why that would work. I think of taper as changing the curve of the increase in resistance. Wouldn’t the volume pot also make more sense after the output buffer?

Anyways not helpful to your question just wanting to understand myself.

 

[jimilee]

I’m just wanting to understand how a different taper would matter on it working in reverse. I’m assuming you mean fully ccw is max volume? Not saying you’re wrong it just doesn’t make sense to me, and I’d like to know why that would work. I think of taper as changing the curve of the increase in resistance. Wouldn’t the volume pot also make more sense after the output buffer?

Anyways not helpful to your question just wanting to understand myself.

Great question, C taper is a reverse log taper. In my mind, that would work.

 

[benny_profane]

If you change the taper, you still have to swap legs one and three. Think if it like flipping the graph vertically.

 

[jimilee]

If you change the taper, you still have to swap legs one and three. Think if it like flipping the graph vertically.

Yep, makes sense. Thank you sir.

 

[Locrian99]

Great question, C taper is a reverse log taper. In my mind, that would work.

I always thought of it as a taper increases quickly then kind of flattens c taper inscreases slowly then goes up quick.

 

[benny_profane]

Yep, makes sense. Thank you sir.

Sorry, I messed up. Just install an A-taper and change the legs.

I think I’ve gotten us both twisted up now. I think C-taper with the legs swapped is right.

Posterity: I was making this too complicated. Just swap the legs. Thanks for the confirmation @jimilee

 

[derevaun]

I too am confused. But I would imagine that since it's working in reverse--full volume CCW, no volume CW--the taper wouldn't need to change in order for it to otherwise feel like an A taper? The "S" shape is backward, but it would still be most gradual at either end and faster change in the middle. Or not, I'd build a lot more pedals if I weren't so afraid of messing up on the pots.

 

[Betty Wont]

That’s not how it works. It’s not how ANY of this works….

 

[jimilee]

I too am confused. But I would imagine that since it's working in reverse--full volume CCW, no volume CW--the taper wouldn't need to change in order for it to otherwise feel like an A taper? The "S" shape is backward, but it would still be most gradual at either end and faster change in the middle. Or not, I'd build a lot more pedals if I weren't so afraid of messing up on the pots.

But messing up is how you learn,

 

[benny_profane]

But messing up is how you learn,

Did you sort it out?

 

[jimilee]

Did you sort it out?

I did.

 

[benny_profane]

I did.

Care to share with the class?

 

[jimilee]

Care to share with the class?

Sure. Using the normal A100k, I reversed the outer 2 lugs with some wire. Because 1 of the outer lugs isn't tied to the middle lug, a reverse log wouldn't reverse the flow, only change the taper. In a past layout, I made the same error but lugs 2 and 3 were tied together, so a reverse log pot did the trick.

 

[Laundryroom David]

But messing up is how you learn,

One hundred percent this!

 

[Locrian99]

The 2nd pedal I ever built, and first that wasn’t a kit was a strip board fuzz face. The volume pot works backwards. Has since I first built it, I wired it backwards. I was so happy it worked at all I just let it be. At this point I just know it works backwards and will never fix it, not that I ever use it, also made me realize I’m more of a muff guy.

 

[jimilee]

The 2nd pedal I ever built, and first that wasn’t a kit was a strip board fuzz face. The volume pot works backwards. Has since I first built it, I wired it backwards. I was so happy it worked at all I just let it be. At this point I just know it works backwards and will never fix it, not that I ever use it, also made me realize I’m more of a muff guy.

Yeah, I prefer muffs as well…