Earthquaker Devices - Talons  [traced]

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

Hi folks,

do anyone here have some information about this pedal?
I tried to google it and I found this gut picture.

it seams not to be an uber-complicated circuit!

thanks for the help
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eqdtalons5.jpg
eqdtalons5.jpg (44.8 KiB) Viewed 3270 times
Zwischen Ordnung und Chaos fangt die Musik an

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zedsnotdead
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Post by zedsnotdead »

Ok so i got hold of one of these beasts and took several guts photos.

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I didn't want to take the pots apart, pedals not mine and the owner didn't want any piece of detailed info of it to be public (hence the blemished date and so...)
Sorry for the crapy photos, but that's all I could shoot at the time.

Hope it helps!

Cheers!

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ALDOUSCROSS
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Post by ALDOUSCROSS »

possibly a Guv'Nor. (just my guess)

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Post by zedsnotdead »

Forgot to mention: Leds are clear red.

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zedsnotdead
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Post by zedsnotdead »

Ah, one other thig. I still have the pedal with me for a week or so. If you need me to check anything just ask and Ill do my best.

Cheers!

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darmstat
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Post by darmstat »

Do you have a list of the components? Here is what i have so far as a guess.

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zedsnotdead
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Post by zedsnotdead »

I'll try to get some values and post them here.

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darmstat
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Post by darmstat »

Second guess at values from pictures???

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zedsnotdead
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Post by zedsnotdead »

Just got hold of the pedal. Everything is almost right darmstat, just a couple corrections!

Check it:

Image

My only doubt is that diode, but I guess it's just for polarity protection...?!

Cheers!
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Earthquaker - Talons components trace
Earthquaker - Talons components trace

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darmstat
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Post by darmstat »

Great zednotdead. Would you happen to have some pictures of the other side of the pcb board?

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Post by zedsnotdead »

Pictures from my first post are front and back.
I know it's hard to see the tracks, mainly no the backside, but those were the best I could take.... sorry. :|

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darmstat
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Post by darmstat »

This is what i have so far with the pictures available.

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darmstat
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Post by darmstat »

with 4.6 k resistor

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Nocentelli
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Post by Nocentelli »

Thanks for this! I think the presence control should probably be connected to the inverting input of IC1 instead of the output, and the three tone controls should have their wipers connected to the inverting input of IC2.
Steven_M wrote: 21 Jan 2011, 17:52
biffa wrote:Sorry,but u r not the only member here
I'm not? Well fuck this site then. I only want meaningful conversations with myself.

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Post by zedsnotdead »

Just talked to the owner of the pedal, he said I could keep it for a couple of days more :applause:
So, I don't want to take it apart, but I'll try to verify the connections with a multimeter. If it beeps it's ok :P If not... i'll figure it out and correct the schematics (thank you so much darmstat!!!! :thumbsup )

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darmstat
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Post by darmstat »

So Something like this Nocentelli?

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Post by darmstat »

OOPS... I uploaded the wrong one. Here is may updated version.

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Post by Nocentelli »

Yep. And you would normally expect the resistor hanging off the IC1 non-inverting input to be connected to vref rather than ground, and to be smaller in value. I wonder if the 3M3 and cap to ground pair are actually connected to the "guitar side" of the input cap, and there is a different bias resistor somewhere (usually 1M or 470k in this type of circuit) connecting the opamp input to vref? I say all this from the perspective of not having spent hours studying the trace itself, so it is just speculation.
Steven_M wrote: 21 Jan 2011, 17:52
biffa wrote:Sorry,but u r not the only member here
I'm not? Well fuck this site then. I only want meaningful conversations with myself.

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darmstat
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Post by darmstat »

This my best guess with the pictures and i think i am missing just 2 resistor( 2 x 10k ) which could be somekind of voltages dividers. I am not sure. Please feel free to correct or toss in an oven....lol

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Post by darmstat »

diode is just a protection diode.

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