E.W.S Tri-Logic II Bass Preamp  [traced]

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OrionManMatt
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Post by OrionManMatt »

bs_ane wrote:Has anyone made the schematic or the component list??
I wish I knew how (or, perhaps, trusted myself) to draw a schematic. I'd probably have it for you by now if I could. :)

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chicago_mike
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Post by chicago_mike »

Always start with the power supply. :)

And work your way BACK to the input signal.

I'm still debugging some stuff, but I do hope to get it out tonight. :)
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Post by chicago_mike »

Okay!! My next post will be relate to actually getting this thing ready.

I can't do a layout to save my life..so I need help there. BUt ill post a schema..unverified, and a parts list.

also...The AMP / Thunderfunk bass amp thread...I should be updating that soon too.
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Post by quaternotetriplet »

chicago_mike wrote:Okay!! My next post will be relate to actually getting this thing ready.

I can't do a layout to save my life..so I need help there. BUt ill post a schema..unverified, and a parts list.

also...The AMP / Thunderfunk bass amp thread...I should be updating that soon too.
youre the man!!!!!!1

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Post by chicago_mike »

I wish bro!

I was having a bitch of a time modding my hartke...turns out I just needed another probe for my scope. :oops: :slap:

Okay, so parts list coming up today! Promise!
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Post by chicago_mike »

I'm making the trace piccies B&W, hopefully someone can make an accurate etchable trace for this. :)

Got most of the component list done too. :) Working on resistors.
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Post by bluetube »

here's my take on the main board. kindly verify. :)

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Post by bluetube »

bluetube wrote:here's my take on the main board. kindly verify. :)
resized. :slap:
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Post by bluetube »

filter caps! :slap: :lol:

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Post by chicago_mike »

:hug:

Can a man love another man and not be gay? Bromance shit right?? :applause:

Dude!! Too cool!!! :D
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Post by pedalgrinder »

How can this thread have traced on it when i can't see [smilie=a_holyshit.gif] a post anywhere of a schematic or component list anywhere unless iam blind. I think someone jumped the gun there.
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Post by Silent Fly »

pedalgrinder wrote:(...) i can't see [smilie=a_holyshit.gif] a post anywhere of a schematic or component list anywhere unless iam blind.(...)
+1

I am totally lost... [smilie=a_cry.gif]
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Post by bluetube »

Silent Fly wrote:
pedalgrinder wrote:(...) i can't see [smilie=a_holyshit.gif] a post anywhere of a schematic or component list anywhere unless iam blind.(...)
+1

I am totally lost... [smilie=a_cry.gif]
I traced the foil side with reference to the component side and whatever source I could pull from the posted attachments.

:idea: Flip and rotate the foil side image then overlap the component side image. Was hoping that someone with an actual unit would confirm the layout. :wink: :wink: :wink:

I know I got the filter caps wrong. I did time for that already. :lol: I find the filter cap after the drop resistor suspect as well. But that's how I saw it. Probably some more errors. Not probably, I'm sure of it. :lol:

Take a crack at it guys. Hopefully we can draw a schematic from it. :wink:

Thank you Chicago_mike and OrionManMatt for the "references". :D

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Post by chicago_mike »

I'll work on it today..I'm a little sick but I should be able to. I have a parts list..not yet complete.
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Post by quaternotetriplet »

chicago_mike wrote:I'll work on it today..I'm a little sick but I should be able to. I have a parts list..not yet complete.
will wait for this....

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Post by bluetube »

Active/passive switch -> mosfet buffer -> opamp gain -> bax + mid? :?:
Just trying to get the ball rolling folks. :D

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Post by chicago_mike »

Yep! :D
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Post by bluetube »

I was hoping I could post what I think is a working schematic. But I can't figure out how the PA switch works. Even after receiving a detailed description of it. :slap: :slap: :slap:

Some resistor and pot values unknown. Anywho, I might as well post it. Feel free to correct it guys. :popcorn:
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Post by chicago_mike »

signal hits the passive active switch before anything. Its a dpdt. top 2 lugs are one resisitor, bottom 2 are another and the middle lugs are the signal from the jack to the pcb. :D
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Post by bluetube »

chicago_mike wrote:signal hits the passive active switch before anything. Its a dpdt. top 2 lugs are one resisitor, bottom 2 are another and the middle lugs are the signal from the jack to the pcb. :D
That's one switching option similar to what I had in mind. :D The photos say otherwise though. :shock: Maybe they got it wrong in the factory or I need to get my eyes checked? :) :) :)

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