how can i make a boss ds-1 behave more like a fuzz pedal?

[anotherjim]

Ah, the Tone output needs to "see" the Level pots resistance which is 100k, so adding a 100k resistor from Tone lug 2 to Level lug 1 should satisfy this.

[m4268588]

[snow123]

Ah, the Tone output needs to "see" the Level pots resistance which is 100k, so adding a 100k resistor from Tone lug 2 to Level lug 1 should satisfy this.

wdym by that?

[snow123]

is the red schematic thing a clean boost circuit?

[snow123]

i just did that with the lpb1 circuit and it now sounds kinda like a misbiased fuzz face lol. it sounds awesome tho, but its not doing what i want it to do.

[anotherjim]

Ah, the Tone output needs to "see" the Level pots resistance which is 100k, so adding a 100k resistor from Tone lug 2 to Level lug 1 should satisfy this.

wdym by that?

After some thinking, you shouldn't need this extra 100k.
Ok, The Tone pot is a mixing control between 2 filters. The wiper of this pot only works as intended if there is some kind of load resistance on the wiper otherwise it won't give the right sound at the extremes of the pot rotation.
But an LPB-1 has a low input resistance anyway. Is it a stock circuit? If R4 is 100k, that should be a similar load on the Tone pot to the existing Level pot.

If you wired it in between the pots how I suggested, the LPB-1 shouldn't have the input resistor R1 or the volume control VR1 (the DS-1 Level pot will do that job). You'd have to remove the wires from the pot lugs to the DS-1 PCB otherwise the LPB would be bypassed.

[m4268588]

Load is still heavy.

[anotherjim]

R5 x Hfe (maybe 150k?)// 100k// 1M may not be much different from 100k pot with buffer impedance after it, but if it biases ok, doubling the 100k may be better.
...but, I've seen LPB1 with much lower bias resistor values, which is why I ask which circuit it actually is.

[snow123]

i just did that with the lpb1 circuit and it now sounds kinda like a misbiased fuzz face lol. it sounds awesome tho, but its not doing what i want it to do.

I should've also mentioned that it's boosting the volume as it should (the volume isn't cutting out at any point which is good), but both the lpb1 and ds1 volume controls are kinda wonky (like the tone control is changing a little bit while adjusting the volume and stuff), and it just sounds like a misbiased fuzz face.

[snow123]

R5 x Hfe (maybe 150k?)// 100k// 1M may not be much different from 100k pot with buffer impedance after it, but if it biases ok, doubling the 100k may be better.
...but, I've seen LPB1 with much lower bias resistor values, which is why I ask which circuit it actually is.

This is the lpb1 circuit I used: http://tagboardeffects.blogspot.com/2013/01/electro-harmonix-lpb1-with-trimmer.html?

[snow123]

Ah, the Tone output needs to "see" the Level pots resistance which is 100k, so adding a 100k resistor from Tone lug 2 to Level lug 1 should satisfy this.

wdym by that?

You'd have to remove the wires from the pot lugs to the DS-1 PCB otherwise the LPB would be bypassed.

like remove the lpb1s level trimpot?

[anotherjim]

What "level trimpot"? I didn't know it had one!

[snow123]

What "level trimpot"? I didn't know it had one!

The lpb1 layout I used replaced the level pot with a trimpot

[snow123]

Ah, the Tone output needs to "see" the Level pots resistance which is 100k, so adding a 100k resistor from Tone lug 2 to Level lug 1 should satisfy this.

wdym by that?

After some thinking, you shouldn't need this extra 100k.
Ok, The Tone pot is a mixing control between 2 filters. The wiper of this pot only works as intended if there is some kind of load resistance on the wiper otherwise it won't give the right sound at the extremes of the pot rotation.
But an LPB-1 has a low input resistance anyway. Is it a stock circuit? If R4 is 100k, that should be a similar load on the Tone pot to the existing Level pot.

If you wired it in between the pots how I suggested, the LPB-1 shouldn't have the input resistor R1

i removed r1 on the lpb1 and now it hits max volume when the ds1's volume is at 12 o clock, if i turn the ds1s volume up past 12 it gets quieter

[soggybag]

Try the mods here: https://www.diystompboxes.com/DIYFiles/up/Build_Your_Own_DS-1_Distortion.pdf

[anotherjim]

i removed r1 on the lpb1 and now it hits max volume when the ds1's volume is at 12 o clock, if i turn the ds1s volume up past 12 it gets quieter

I'm sure I mentioned removing VR1 as well as R1? Both of them connect to 0v while the DS-1 controls use Vref 4.5v and that is the cause of the problems.

[snow123]

i removed r1 on the lpb1 and now it hits max volume when the ds1's volume is at 12 o clock, if i turn the ds1s volume up past 12 it gets quieter

I'm sure I mentioned removing VR1 as well as R1? Both of them connect to 0v while the DS-1 controls use Vref 4.5v and that is the cause of the problems.

but how would i go about removing vr1, like do i replace with with a 100k resistor and jumper one of the sides of the resistor to the output or what?

[anotherjim]

Don't replace VR1 with anything. The output capacitor C2 feeds its lug 3, instead, connect it to lug 3 of the DS-1 level pot.
If you want to keep the existing LPB-1 output wire, link the PCB pads of VR1 lugs 2 & 3 with some wire.

[snow123]

Don't replace VR1 with anything. The output capacitor C2 feeds its lug 3, instead, connect it to lug 3 of the DS-1 level pot.
If you want to keep the existing LPB-1 output wire, link the PCB pads of VR1 lugs 2 & 3 with some wire.

i just removed the trimpot and jumpered the output cap to the output, and nothing has changed.

[anotherjim]

I can't see why it should misbehave now. Are you sure you disconnected the right pot wires in the DS-1? IIRC, there's a flat cable from the pots to the PCB and the ones to disconnect are I think numbered 7 & 9.
You should still have the DS-1 4.5v reference on all of the DS-1 tone & level pot lugs.