Dr Boogey Splatty

[Al Heeley]

So I've completed the Dr Boogey build and the huge in-yer-face distortion of this thing is truly a wonderful thing.
I used a normal 1M-b pot for the gain.
When you turn down the enormous gain it gets to a very abrupt point where there is suddenly zero, turn it back a touch it goes full on. No real ramp up from off to low to screaming gain level. If you have it just on the edge then the sound decays away to a nasty splatty distortion sound then cuts off.
Is there something I can attend to on the various trim pots to make this more acceptable? Is it worth replacing with 500k pot instead?

[anchovie]

I used a normal 1M-b pot for the gain.

The schematic calls for a log (1M-A) pot - that will spread the lower-gain sounds over the majority of the pot's travel.

[Al Heeley]

is the splatty sound of the decayed signal a characteristic of the pedal ?

[ghostsauce]

The one I built isn't splatty at all, even at massive gain settings (albeit I use minimal amounts). But it does get heavily compressed as it gets up there, so maybe dial the gain back some?

[Brymus]

Splatty ,sounds like a bias issue.
The FETs should be biased to 4.5v - 5.5v to start with ,I prefer mine around 5v but they all differ a little where they sound best.

Your gain pot doesnt sound right either you should get a good range of gains even with a 1M pot,I used a 1M audio and I can dial in almost any gain I want,with the last 10% of pot travel sounding about the same just a little more compressed at max.
I like mine right at 90% down to about 50% on the pots travel,belowe that its not enough gain for my taste but still usable distortion for others.

[Al Heeley]

I've probably not set the trimpots correctly, I just did it quickly by ear in no particular order. If there is any advice about doing this 'properly' than I'd be grateful.

[Caferacernoc]

If you mess with it by ear then basically get it set your gain where it's splatty, then slowly turn each trimmer back and forth a little until you find one that has an effect on the splattyness. And then try to dial it out of course!

[Al Heeley]

I'm thinking there may also be a short somewhere, the bass pot seems pretty ineffective, its like its always on max.
The gain seems to have very little ramp, at 1 its off, at 2 its on huge and at 10 its on a bit more huge.
Will take the opportunity to tweak the 4 trims at same time, I'll also recheck the gain pot is a log not a linear.
We're getting there though!