Parasite Wah Sweep

[sarcasticallyincharge]

I've built the parasite wah, really love it, it's exactly the type of angry sounding filter type thing I want.

Only issue is the same I've seen a lot of people mention, It goes extremely dark/silent when heel is all the way down.

I've looked at mods mentioned by other people, but I haven't found anything that addresses this specifically.

I'm not great at circuits so I haven't really worked out how to mod it to address this. Would something like connecting a resistor in series with one of the lugs address this?

 

[Feral Feline]

I've built the parasite wah, really love it, it's exactly the type of angry sounding filter type thing I want.

Only issue is the same I've seen a lot of people mention, It goes extremely dark/silent when heel is all the way down.

I've looked at mods mentioned by other people, but I haven't found anything that addresses this specifically.

I'm not great at circuits so I haven't really worked out how to mod it to address this. Would something like connecting a resistor in series with one of the lugs address this?

A treble-bleed to address the darkness?

 

[sarcasticallyincharge]

Returning from the afterlife to bring a warning and good news: After ripping my hair out over figuring out how to attach the pot to a crybaby shell, issue was that short shaft pots are hard to attach.

Found this pot which made everything way simpler. Long shaft, and also it fit the pinion, unlike the metal pots:

10K Logarithmic Stereo PC16 Potentiometer Piher

Piher enclosed 10K logarithmic stereo potentiometer featuring a 6mm diameter shaft and self-extinguishing plastic case, suitable for PCB applications. 6mm diameter splined shaft 31.5mm shaft length ±20% tolerance 300° mechanical rotation Carbon resistive element Dust proof enclosure Self...

www.switchelectronics.co.uk

The sweep thing is a mechanical issue, not about the circuit. Essentially, make sure it's at it's brightest when the treadle is pushed down. A crybaby pedal doesnt allow for a full sweep of the pot

 

[swelchy]

Returning from the afterlife to bring a warning and good news: After ripping my hair out over figuring out how to attach the pot to a crybaby shell, issue was that short shaft pots are hard to attach.

Found this pot which made everything way simpler. Long shaft, and also it fit the pinion, unlike the metal pots:

10K Logarithmic Stereo PC16 Potentiometer Piher

Piher enclosed 10K logarithmic stereo potentiometer featuring a 6mm diameter shaft and self-extinguishing plastic case, suitable for PCB applications. 6mm diameter splined shaft 31.5mm shaft length ±20% tolerance 300° mechanical rotation Carbon resistive element Dust proof enclosure Self...

www.switchelectronics.co.uk

The sweep thing is a mechanical issue, not about the circuit. Essentially, make sure it's at it's brightest when the treadle is pushed down. A crybaby pedal doesnt allow for a full sweep of the pot

exactly.... Every Wah I've owned I messed with t\where the pot was rotated to find the sweet spot on the sweep I wanted..

 

[pricklyrobot]

Could you also put another pot (either internal trim, or regular style mounted on the side if you want to re-tweak) in series with the treadle pot to fine tune the range?

Some expression pedals have this.

 

[anevilspar7an]

Could you also put another pot (either internal trim, or regular style mounted on the side if you want to re-tweak) in series with the treadle pot to fine tune the range?

Some expression pedals have this.

That's essentially the sweep control on the Jerry Cantrel signature crybaby, @Stickman393 and Guardians of the analog are the authority on this mod.

 

[sarcasticallyincharge]

There's some mods mentioned here that I'm interested in, but doesn't say much about what they do

V

Thread 'Parasite Wah get better after few mods'

May 10, 2022

So, my attempt to build this unfamous Wah
I did first what is mentioned on the documentation and I experienced some issues: Big volume, and saturation

So I did a lot of research about the pedal, find lot of guts and asked some people that got the original one, I found that 2 revisions where made, I done the original pedal (the sabbath one) and this is really the good things to change. Now the pedal sounds really great
- R2 650K -> 100K
- R5/R7 200R -> 220R (not really crucial)
- R2 200R -> Jumper
- D100 1N587 -> 1N270 germanium diode
- R11 16K -> 5,1V Zener diode

Now the pedal sounds...

• visualdistortion
• Replies: 1
• Forum: Build Reports

• 
• 

I'd be interested in a sweep mod too.

Generally very happy with it as someone who isn't a fan of most wahs, but still interested in tweaking it a bit

 

[Cybercow]

Inspecting the mods listed above, the 2nd reference to "R2 200R" should be "R12 200R"
And the reference to "D100 1N587" should be "D100 1N5817"

- R2 650K -> 100K (I use a 1M trimpot here and adjust to taste - this mod makes the most significant change to overall sound of the circuit.)
- R5/R7 200R -> 220R (not really crucial)
- R22 200R -> Jumper
- D100 1N5817 -> 1N270 germanium diode
- R11 16K -> 5,1V Zener diode

There really isn't "sweep mod" for this circuit. The sweep is controlled by setting the degree angles of the pot geers. No Cry Baby sweep actuates the full range of the mounted mount. A sweet spot needs to be found by adjusting the initial contact point of the sweep gears with treadle toe (or heel) fully up or fully down.