Aion fx Deimos

Username123

Username123

Well-known member
Just finished up this Aion Fx Deimos last night. Its my second pedal i have built.
It's a tone bender mark II with a switch that removes the first transistor stage, turning it into a fuzz face. Haven't played with it much because my hands have been sore. I Still got to get it biased. Before I did this pedal I didn't solder for months, so I practiced a bit and completed this in a few hours with no issues.


IMG_20220424_114734~01.jpg IMG_20220424_115354~01.jpg
 
I built one of these recently as well, and had a lot of fun with it. How do you find the 1.5 setting? I feel like mine is a little muddy sounding, but that could also just be the nature of the way that circuit sound.
 
Big Monk said:
That's because the Aion kit doesn't change the input capacitor on the 1.5 side of the switch. Basically the switch makes it a Fuzz Face with a HUGE (relatively speaking) 4.7 uf input cap.

The original MK 1.5 units would have had a much smaller (15 nF) input cap and much smaller (4.7 nF) output cap. Changing C4 to something in the 10-47 nf range should give a punchier (and brighter) tone for the 1.5 side.
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Oh interesting, that's good to know (and I wish I would've known about that prior to putting it all together haha. Seems strange that that wouldn't be the go-to value for that cap anyways on the build docs
 
Just out of curiosity... part of the text looks a bit weird (DEIMOS, mode, 9V). Photoshop?
 
temol said:
Just out of curiosity... part of the text looks a bit weird (DEIMOS, mode, 9V). Photoshop?
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I actually did do some color correction, but I looked at the un-edited photo and it had the same blur. Not sure if the blur is the camera not focusing right in that spot or if it's something else.
 
Big Monk said:
The original MK 1.5 units would have had a much smaller (15 nF) input cap and much smaller (4.7 nF) output cap. Changing C4 to something in the 10-47 nf range should give a punchier (and brighter) tone for the 1.5 side.
Click to expand...
What schematic are you referencing? The Vox Tonebender uses a smaller input cap, but the Sola Sound Mk 1.5 has a 5uF input cap.
 
Username123 said:
Lol. I agree with the too much treble thing. And I will definitely keep it stock for now. The tonebender side is so good that I don't really want to change anything in the circuit. Don't want to risk losing that sound.
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I agree with you there, the II setting sounds so gnarly I love it. And the 1.5 version isn't bad by any means, just a little muddier/flubbier than I was expecting it to be.
 
Great looking build! What transistors did you go with? I got a Flying Dutchman set from Small Bear and thought the sound was excellent but needed a touch more low end so I added a bit larger output cap on the back of the board.
 
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