im making a stompbox tonight

[bassmasta17]

any name suggestions?
woolly mammoth was the only one to come up... watched 10,000 BC yesterday.

[oskar]

http://filters.muziq.be/model/zvex/woollymammoth

try again...

[newfish]

Caveman's Cahunas?

[~arph]

Hairy Hamster?

[bassmasta17]

Caveman's Cahunas?

that might be it!!!!!

[bassmasta17]

im alittle confused on the tone pot thing. any one got a picture or drawing?

[bassmasta17]

will this work

[bassmasta17]

where would i put the wires?

[bassmasta17]

ok wired it up doesnt work.
this is how its wired..
in to lug 3
lug 2 to cap
cap 2 to ground
lug 1 to out

[frequencycentral]

ok wired it up doesnt work.
this is how its wired..
in to lug 3
lug 2 to cap
cap 2 to ground
lug 1 to out

Lug 3 to cap, lugs 2 and 1 to ground.


Zach

[petemoore]

in to lug 3
lug 2 to cap
cap 2 to ground
lug 1 to out
 Put a cap from SP to Gnd. use big enough cap you can hear that HF's have been shunted to a large degree.
 Now put a resistance between the cap and ground, large/small enough to mostly control how much of the HF's are shunted by changing the R value.
 A pot wired as VR [variable resistor] uses the wiper and an outside lug [test with dmm].
 The basic configuration is C/R. Signal path goes through the seriesed cap and resistor.

[bassmasta17]

in to lug 3
lug 2 to cap
cap 2 to ground
lug 1 to out

will that work? looking back it might have been diffrent.

in to lug 3
lug 2 to cap
cap 2 to ground
lug 1 to out
 Put a cap from SP to Gnd. use big enough cap you can hear that HF's have been shunted to a large degree.
 Now put a resistance between the cap and ground, large/small enough to mostly control how much of the HF's are shunted by changing the R value.
 A pot wired as VR [variable resistor] uses the wiper and an outside lug [test with dmm].
 The basic configuration is C/R. Signal path goes through the seriesed cap and resistor.

not sure what you are talking about. whats the SP?

[bassmasta17]

what cap would i use to roll off treble? i have 0.01 uf and 0.1 uf caps.
sorry about this but can some one draw this on PS or paint?
would i have the cap going into lug 3 from the wire going to the volume pot then lug 1 to ground and lugs 2 and 1 connected?

[oskar]

This:

ok wired it up doesnt work.
this is how its wired..
in to lug 3
lug 2 to cap
cap 2 to ground
lug 1 to out

-Work it should! Hooked it up wrong you did!

Sounds like:




from: http://www.muzique.com/lab/swtc.htm
Original article from ampage: http://hammer.ampage.org/files/SWTC.gif

-So, strong is the power of the high frequencies! Cut it off we must!

The cutoff is calculated by the formula F_c=¹/_2*pi*r*c

Your potentiometer is 100k so that value also provides lowest F_c (Cutoff frequency, the frequency( in Herz) where the volume will start to roll off)
you have a 10n and a 100n cap.

The values need to go into the formula without suffix so:

100k = 100000
100n = 0.0000001
10n =0.00000001

we put the 100k and the 100n into the formula to se what we'll end up with

F_c=¹/_{2*3.14*100000*0.0000001}=15.9

16Hz is subaudio. Much to low.
If we use the 10n cap instead we get 160Hz. As these are the two values you've got, use the 10n.

-Use the F_c!

[bassmasta17]

ill try Monday.
10n = 0.01uf correct?
that is what i will use.
thanks oskar cough yoda cough

[bassmasta17]

also if any one has any ideas for a mod or improvement you can post them. the box that it is in now is very small but i have one more 100k pot that is about the size if a dime. Its not a trim pot. Maybe a simple gain of fuzz.

[bassmasta17]

ok building it now going to post my results in a while.

[bassmasta17]

well it works but when i put the treble up the signal dies. Is that from it putting all the sound into the ground? Sounds realy raunchy. about the volume loss of putting a tone in, the volume goes down alot but when the volume is all the way up the level is the same as the bypass.

[bassmasta17]

also Cavemans Caughnas as a name is lookin good any other suggestions?

[oskar]

well it works but when i put the treble up the signal dies.

"There is no such thing as silence. Something is always happening that makes a sound."
-John Cage

Which filter solution did you use?

Is that from it putting all the sound into the ground?

If you direct all of the signal to ground, then that is what you get. You have measuring equipment.
By golly, use it!

about the volume loss of putting a tone in, the volume goes down alot but when the volume is all the way up the level is the same as the bypass.

This last quoted sentence doesn't make sence to me. Neither from engineering, nor from linguistic, point of view...     
The volme goes down when you put in a tone?     
If you used the SWTC solution the volume out should drop to 50% p-p. This is however also dependent on what comes after the unit.
If you are driving an amp with low impedance then the signal will decrease further.

Now, where did this drawing come from? Compare the way this output pot is wired with just about any other stompbox...