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Here is a Ashdown bass envelope filter schematics and pcb pictures.
Schematics is taken from ashdown.
If someone need some ashdown schematics - write a mail to the company.

Good one, Thanks.

The rectifier circuit has some quirks, I wonder what the motivation behind that is (need to look at it in more detail).

I haven't actually played through one of these. What's it like compared to a Meatball?

I never played with meatball. The sound of this envelope is good for bass, but schematics is with a lot of elements

As a bassist I can say this a good envelope filter, and I must say I'm not a big fan of Ashdown... When it comes to amps and cabs. But this is something I've listened and really liked. For envelope filters, I would chose in order of preference, 3Leafe Groove Regulator, EBS Bass IQ, DOD FX 25 and HelectroHarmonix bass balls. This last one is very easy to mod!

Regards

george giblet wrote:Good one, Thanks.

The rectifier circuit has some quirks, I wonder what the motivation behind that is (need to look at it in more detail).

I haven't actually played through one of these. What's it like compared to a Meatball?

I would imagine that they wanted to have a product with as little of the same tired old ripple in the sweep circuit!

Not finished..I have to clean and connect some traces, and make some larger obviously,

I should have that done today or when I get back from a quick weekend gig.

I just purchased one of these off of Reverb, but have to come up with a power supply for it (shouldn't be too hard, 9V center-negative). Meanwhile, I added all of the component values to the schematic PDF. They're "comments", so you can edit or move them. chicago_mike, did you ever finish your board layout?