Nutube Overdrive Eurorack

[dathey]

My take on rezzonics' nutube overdrive/screamer:  https://rezzonics.blogspot.com/

• Eurorack 12HP: panel layout via FPD and toner transfer.
• Running on +18v instead of +9v
• Korg NuTube: https://korgnutube.com/en/guide/
• Diode dipswitch selectors, for both feedback and hard clip (http://diy-fever.com/effects/the-ultimate-overdrive/)
• Symmetrical and Asymmetrical operation, with additive series diode combinations provided.
• Traditional distortion section generally follows Boss HM-2.
• Diodes used:  silicon(1n4148), germanium(1n34a), red led, mosfet(2n7000), schottky(1n5719), and nanolog N2
• Mix control between nutube and traditional distortion
• 'Warp' / compliance control for hard clip diodes: http://www.muzique.com/lab/sat.htm
• Bass cut control
• True bypass relay: https://diy.thcustom.com/shop/uber-switch-relay-true-bypass-with-mute-kit/

It at least turns on and the tube glows: now time to see if it actually works...!

[garcho]

Nice work, bravo

[Jarno]

Nice work, and, good to see there are more eurorack people here 

Wonder how you'll get along with the nutube. Did you do anything with respect to signal levels (eurorack is way hotter than a guitar signal)?
I have done a combined fuzz face and clipper distortion (either tubescreamer, or DOD 250 /MXR Distortion + depending on how you build), and did not, given that I was going to combine it with the stompbox adapter circuit of Ken Stone/ CGS (still needs to happen).

[dathey]

The "manual" does not specify the maximum input signal level, but I only planned to use this with guitar level signals.

http://www.hoshinogakki.co.jp/pdf/ibanez/manual/en/electronics/NTS.pdf

Also, I found that I had to dial it back to 9 V, as I was getting too much output distortion with 18 V