Re: Death by Audio - Kill Kill Filter

~arph · Post by **~arph** » 10 Jun 2014, 16:29

I see the same monkey is still doing the pcb design and soldering

FiveseveN · Post by **FiveseveN** » 10 Jun 2014, 18:06

selfdestroyer wrote:unnecessary tiny traces for the win!

I don't think they know how to change trace width in whichever CAD software they use (probably PADS for DOS).
Seriously, who the fuck would do this instead of the red route?!

Anyway, here's an overlay and straightened/aligned images:

Glass_Hero · Post by **Glass_Hero** » 14 Jun 2014, 21:29

i traced his a while back.. Enjoy..

This is not an updated sound saw..

Bernardduur · Post by **Bernardduur** » 15 Jun 2014, 09:54

Wow, looks a lot like a muff

Nocentelli · Post by **Nocentelli** » 15 Jun 2014, 10:57

...but no clipping diodes. So it's BMP Q1 ->BMP sustain control -> another BMP Q1 -> two odd switchable quasi-BMP tone stacks->BMP Q4.

I can't visualise what the tonestacks would do as drawn: The normal lug 3 to ground resistor is missing, and instead the wiper is tied to lug 1 (i.e. 82n to ground) via that second 220k resistor. If the 220k went from lug 3 to ground, it would give an extremely scoopy, but fairly narrow sweep -

Bernardduur · Post by **Bernardduur** » 15 Jun 2014, 12:43

The 220k is a feedback path......

The tone control should more work like a filter on one side of the potmeter and a pass through on the other.

Glass_Hero · Post by **Glass_Hero** » 15 Jun 2014, 15:42

the filter is based off a twin T filter, with only one adjustable leg.. A twin T should give a notch response, however in this configuration it produces a tilt response..

This pedal is based off the current production dba fuzz war (big muff), the third stage is omitted (the one with the clipping diodes) and some values have been tweaked..

mmolteratx · Post by **mmolteratx** » 15 Jun 2014, 18:20

Uggh. Every time I see guts of their pedals, I just can't help but wonder what fuckwad thinks that's even remotely acceptable, especially for the prices they charge.

Bernardduur · Post by **Bernardduur** » 15 Jun 2014, 20:17

Glass_Hero wrote:the filter is based off a twin T filter, with only one adjustable leg.. A twin T should give a notch response, however in this configuration it produces a tilt response..

This pedal is based off the current production dba fuzz war (big muff), the third stage is omitted (the one with the clipping diodes) and some values have been tweaked..

Ah yes, now I see the twin T filter. Wouldn't it be easier to put the potmeter between the cap and ground

BetterOffShred · Post by **BetterOffShred** » 25 Aug 2018, 19:33

Necrobump..

Anyone build one of these? I built one using the main page layout from Tagboard which from what I can tell matches the above schematic.

These DBA layouts only work sometimes, I tried a few different transistors but it gates pretty bad and doesn't seem like any of the videos. I was curious if anyone who built one had suggestions on which components they swapped to get it to work haha

Re: Death by Audio - Kill Kill Filter [traced]