Lovepedal Tone Control Value

[chromesphere]

Hey guys,

I have a lovepedal eternity clone that I built along time ago.  I always noticed it sounded a little different, quite dark even with the tone control up full.  Found out last night that I had haphazardly subbed the 5k for a 10k pot.  This obviously effects the tone of the pedal, its much darker.  But my question is, does it also lower the range of the tone dial because I can tell you, comparing it to a LPE with a 5k pot, it cant get anywhere near as bright when its up full.  Even though it's not set up correctly, I gotta say I quite like it compared to my 5k LPE.
Also would it have any other effect on the circuit that I'm missing?  
Here's a schematic, thanks for any advise!

http://i239.photobucket.com/albums/ff314/lovepedaldetective/LovepedalEternitySchematic.gif

Edit: looking at RC filter calculator, when the pot is to the left (470 ohms) the frequency roll off should be 2.2khz.  When its to the right with a 5k pot is 194hz, and a 10k pot, 101hz.   I would have thought the 10k pot would be able to pass as much treble as the 5k pot, but in practice it doesn't...I must be missing something.
Paul

[PRR]

The pot value has nearly no effect when the wiper is at either end. (It is across the opamp's inputs, where there is no voltage difference.)

In simulation, I changed the 5K pot to 50K and I don't see any obvious change.

In either case: this is a mostly-cut network with very mild action. Are you sure the values in the link you gave are the "proper" values?

Wild-stab: changing the Out to -In resistor from 1K to 5K gives a LOT more boost.

The other of-course thought is: mistakes rarely travel alone. If one part is wrong, there may be otherS.

[gasmask]

If the values are correct, check the tone capacitor on your board... The cap can be broken or have another value...

[chromesphere]

Thanks for the responses guys.  I tested them again tonight, yep they sound totally different.

So beside the 10k pot, I did notice something else.  The tone control on the madbean (10k pot) LPE layout uses 220nf and 320R for filtering, where as my version uses 150nf and 470r.  They both have a roll off frequency of 2.2khz but I don't know if those values are interacting with the pot differently but thought I would mention it.  Everything else seems to check out (so far).  Without pulling the pedal to pieces of course. 

Only other thing I can think of is some random solder bridge on the board. 

The funny thing is, I think most people would like the correct version more then my first build as it sounds a bit like its down a hole

Paul

[gasmask]

They both have the same roll off frequency... But different values for "0 and 10" on the pot... I mean maximum range of tone control

[samhay]

Any chance you have a different cap (0.22u in the posted schem) and/or divider resitor (1k...) hanging off the inverting input of the first op-amp ? This sets the bass rolloff at the clipping stage and has a big effect on how dark the circuit will sound.

[chromesphere]

@gasmask, yep but that effects the amount of cut off treble, they both should be able to produce the same amount of treble though (theoretically?)

@samhay, I didn't check the resistors.  I think I'm going to just leave it the way it is.  My layout works properly.  I must have made a 'noob' stuff up when I built the drunken dragon. all good.