Dwarfcraft - Shiva  [traced]

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
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Ed G.
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Post by Ed G. »

Wow, that Youtube video was quite entertaining... seriously, I'm not a fan of fuzz, but that fuzz sounded fun! It's not a fuzz that takes itself seriously, like the designer. It does sound like DOOM!

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juni
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Post by juni »

Hmm, i built this out of curiosity, but i just get a kind of weak overdrive, no anywhere near the gain like on the demos. It adds a nice little flavor when used before another distortion, but on it's own it's weak and useless... Also, the "power struggle" pot just decreases the volume, no drastic change in tone :scratch:

And i'm prettyy sure that i've got everything according to the schem :roll:

Anyone else built from this schematic, is it correct?

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ech0es
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Post by ech0es »

you probably used the wrong IC

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juni
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Post by juni »

Heh, good one. There's no IC here.

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xampworshipx
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Post by xampworshipx »

so what's the verdict on that schematic?

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noise31
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Post by noise31 »

sound great..,..moore pics......tnks

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Post by bumblebee »

The verdict on this schematic is I cobbled it together fromphotos of a shitty pedal covered in tape and various tid bits of info Aen has said on other forums.
its definitely not 100% correct as there's missing and guessed values through out a lot of it, when there's that much tape on there who can tell!?!?!?!?!

I have absolutely zero interest in dwarfcraft pedals BTW so I wont be trying to fix this schematic.
I so dislike the modern digital world that I need to use semi-digital effects to emulate the analog world of cassette, VHS, and vinyl.

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bonnistyle
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Post by bonnistyle »

The schems aren't availible any more :/ could somesone reupload them? I'd be interested in them ;)! Trying to build some pedals out of that corner!

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SPeter
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Post by SPeter »

HERE IT IS!
DWARFCRAFT SHIVA.jpg
DWARFCRAFT SHIVA.jpg (46.77 KiB) Viewed 3880 times
:thumbsup
:D

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bumblebee
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Post by bumblebee »

All my schems got deleted when I changed photobucket accounts.

From here on out I will only upload to this site.
My old schem actually differs from the hand drawn one I have of this pedal, drawn by the tweaker himself.

So i dont know which is correct as I havent been following these pedals as they are complete junk!
I so dislike the modern digital world that I need to use semi-digital effects to emulate the analog world of cassette, VHS, and vinyl.

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Post by soggybag »

Looking at this I was wondering if the other stages need the two bias resistors. Wouldn't the first stage bias the following stages?

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Post by soulsonic »

soggybag wrote:Looking at this I was wondering if the other stages need the two bias resistors. Wouldn't the first stage bias the following stages?
Nope. The only time you could have a situation like that is if all the stages were DC coupled to one another. This circuit is AC coupled because it has caps doing the coupling between stages.
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noise31
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Post by noise31 »

news???

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Bernardduur
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Post by Bernardduur »

Image

Unit I got in..........

POS; lots of tape; volume pot is grounded by pushing the lug as hard to the enclosure as possible....... I can forsee problems in the future.
'No more....... loud music.......'
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Post by bubstance »

My unit is almost the same as the above schematic aside from a few values and 2 added resistors. I've attached a modified version of Bernardduur's schem with changes noted in parenthesis and the added components boxed.

Mine is built on a PCB labeled "Version 2.0" and was mounted on standoffs stuck to the back of the pots. The wiring was fairly neat, but the standoffs made the electrolytic caps touch the bottom plate of the enclosure. I had to add some electrical tape because the pedal kept shorting and making an awful racket.
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Dwarfcraft Shiva.jpg
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Bernardduur
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Post by Bernardduur »

Cool!

No PCB in mine; just perf. The added resistors aren't in mine! R9 was 330k; it colored a bit between orange and red but I measured it and it checks out!

I turned C2 around to make the polarity right
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Post by RnFR »

that 1M emitter resistor makes no sense. wouldn't that reduce the gain of that stage to nothing?
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Bernardduur
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Post by Bernardduur »

RnFR wrote:that 1M emitter resistor makes no sense. wouldn't that reduce the gain of that stage to nothing?
Dunno; maybe 15R (brown, green, black) instead of 1M (brown, black, green)???
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Post by culturejam »

Bernardduur wrote:
RnFR wrote:that 1M emitter resistor makes no sense. wouldn't that reduce the gain of that stage to nothing?
Dunno; maybe 15R (brown, green, black) instead of 1M (brown, black, green)???
I wonder if you can hear a difference between 15R and 0R in a bazz fuss? Having 1M doesn't seem like it would allow the transistor to do much of anything.

Also, what's the point of C2 and C3 being in series? That gives an effect capacitance of a little less than 1uF total. So why not just have the 1uF there and save 2 cents and a little board space?

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Post by Hides-His-Eyes »

Probably used to have a gain control there or something
Testing, testing, won too fwee

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