PedalPCB/Derailer/Ethos TWE-1

[OD is Glorious]

Build Rating

5.00 star(s)

Rolling sustaining distortion. Even though there are multiple switches it is basically a distortion pedal with some ability to dial in other similar tones. Harmonically rich but not all that versatile IMO. You can play with the switches and change from the different distortions and the hi-cut does what it says - turning clockwise cuts highs. Great fun build and I love switches.

I used different colors on the switch tips to identify switches that control cabinet and voice. The Derailer faceplate and the PPCB top jack plate really make for a clean build. I also ordered the Fresnel 3mm LED bezel from Amplified Parts that is a perfect fit. The knobs are 15mm silver and the footswitch is a LMS soft click. The switches are all Taiway. The jacks are Switchcraft and the enclosure is from LMS. It takes some careful drilling in order to get everything lined up perfect.

FYI- I see problems inside my previous build report. It Looks like three of my 2n2 caps were supposed to be 2u2 MLCC. If I remember that build it was flubby. It worked but just not as tight as this distortion.

Also just saw this Ethos price. Yikes

 

[eh là bas ma]

Nice build !

You know there's a mod to get more usable range on the volume and Gain pots with A10k pots ?
It's a very useful mod for this circuit in my experience, makes it easier to dial some low to medium gain sounds.

R

Thread 'Derailer gain mods'

Jan 21, 2021

Has anyone built the Derailer? I've just got mine working and am gobsmacked by the amount of gain and volume early in the knob rotation. It was also built using a TL072 instead of the OPA2134.
Would the OPA2134 have a noticeably different gain structure? Everything I've read suggests little difference in practice but practical experience may show something else.
Would I be better off using log/audio pots for Volume and Gain? And what of the HiCut?

• rickn2112
• Replies: 18
• Forum: Modifications

The build docs wants some expensive OPA2134 for this circuit, but standard TL72 sound exactly the same, so i'd suggest to keep these OPA2134
for another circuit where you can really use them.

 

[OD is Glorious]

Nice build !

You know there's a mod to get more usable range on the volume and Gain pots with A10k pots ?
It's a very useful mod for this circuit in my experience, makes it easier to dial some low to medium gain sounds.

R

Thread 'Derailer gain mods'

Jan 21, 2021

Has anyone built the Derailer? I've just got mine working and am gobsmacked by the amount of gain and volume early in the knob rotation. It was also built using a TL072 instead of the OPA2134.
Would the OPA2134 have a noticeably different gain structure? Everything I've read suggests little difference in practice but practical experience may show something else.
Would I be better off using log/audio pots for Volume and Gain? And what of the HiCut?

• rickn2112
• Replies: 18
• Forum: Modifications

Thanks - I never even looked to see if there were mods. Next time I will experiment.

 

[anevilspar7an]

OPA2134 are great for buffers since they are lower noise spec than TL072, so I second using the TL072 if it isn't being used to buffer the circuit.

 

[OD is Glorious]

OPA2134 are great for buffers since they are lower noise spec than TL072, so I second using the TL072 if it isn't being used to buffer the circuit.

I used the OPAs but good to know a person can run it on the more common op-amp