anevilspar7an
Active member
- Build Rating
EDIT: New enclosure and more mods added, new schematic included.
I have already built a ShamWah board a bit ago that I love the sound of on guitar, but was not quite right with my bass.
I had this first gen Dimebag CFH wah sitting around and decided to rehouse my wah in this. I previously used the Synthcube matte black enclosure. Wima film caps, Kemet film caps in values Wima don't make, Würth electrolytics, Kyocera AVX tantalums, Vishay MLCC caps, Dunlop Hot Potz II 100K potentiometer, a genuine Gagen wound Halo inductor, NOS Continental Devices India transistors; BC109B for Q2 and BC109C for Q3, NOS Fairchild J201 for Q1. Hardware is from LMS and Pure Tone, all gold since I like that particular aesthetic.
Something I'm trying out is running the pedal on 18v vs 9v and have made the changes needed to make it work.
Every removable piece is plugged in using Dupont style connectors since I like swapping boards occasionally.
As with the first build I replaced the first transistor stage with a JFET buffer. I used the PPCB Simple JFET Buffer as my guide. Since I run the pedal on 18v I used a trimpot to dial in half supply voltage.
Original circuit in the background.
Obligatory schematic to show what I changed.
I did a some of Chuck D. Bones's mods, C4 is 47uF and C6 is now a header for the rotary switch. The opamp for the Output Boost is a TLE2071 instead of TL071. Surprisingly I didn't have any TL071 on hand but had the TLE2071 that I can't even remember why I got it. The Sweep pot is a B5K like in most sweep mods, I brought the Boost outside and changed it to A100K, and brought the Body (Q) control outside with a B50K pot. Everything works with the preexisting holes except the output boost, I may make that either a kickable switch like the original or do a remote footswitch.
I have already built a ShamWah board a bit ago that I love the sound of on guitar, but was not quite right with my bass.
I had this first gen Dimebag CFH wah sitting around and decided to rehouse my wah in this. I previously used the Synthcube matte black enclosure. Wima film caps, Kemet film caps in values Wima don't make, Würth electrolytics, Kyocera AVX tantalums, Vishay MLCC caps, Dunlop Hot Potz II 100K potentiometer, a genuine Gagen wound Halo inductor, NOS Continental Devices India transistors; BC109B for Q2 and BC109C for Q3, NOS Fairchild J201 for Q1. Hardware is from LMS and Pure Tone, all gold since I like that particular aesthetic.
Something I'm trying out is running the pedal on 18v vs 9v and have made the changes needed to make it work.
Every removable piece is plugged in using Dupont style connectors since I like swapping boards occasionally.
As with the first build I replaced the first transistor stage with a JFET buffer. I used the PPCB Simple JFET Buffer as my guide. Since I run the pedal on 18v I used a trimpot to dial in half supply voltage.
Original circuit in the background.
Obligatory schematic to show what I changed.
I did a some of Chuck D. Bones's mods, C4 is 47uF and C6 is now a header for the rotary switch. The opamp for the Output Boost is a TLE2071 instead of TL071. Surprisingly I didn't have any TL071 on hand but had the TLE2071 that I can't even remember why I got it. The Sweep pot is a B5K like in most sweep mods, I brought the Boost outside and changed it to A100K, and brought the Body (Q) control outside with a B50K pot. Everything works with the preexisting holes except the output boost, I may make that either a kickable switch like the original or do a remote footswitch.
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