Infinity: an universal guitar preamplifier!

Original effects with schematics, layouts and instructions, freely contributed by members or found in publications. Cannot be used for commercial purposes without the consent of the owners of the copyright.
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DSV
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Post by DSV »

Hi all!

About 2 months ago, I started a project which transformed a BSIAB into an universal guitar preamp for DI applications, and presented it thorugh a youtube video (see link below). Now that I have received all the PCBs and the components, I'd like to share pics the build of a single channel preamplifier for my home studio. Of course, the module presented here can also be used in multi-channel configurations, for live use.

A short presentation can be downloaded here:
:!: http://www.techniguitare.com/projets/Ch ... ity_en.pdf
And the schematics of Infinity here:
:!: http://www.techniguitare.com/projets/Ch ... 1.1-En.pdf

This youtube video shows the first prototype, and contains some samples:
:!:
And here are 2 additional samples (sorry for the sloppy playing):
:!: Vox style
:!: Comfortably Numb (2nd solo) (delay added through Audacity).

I'll add the layouts and the bill of materials later, as I am verifying the printed PCBs through this build.

Finally, here are some photos of:
:!: the prototypes
ImageImageImage
:!: the current build (beginning)
ImageImageImageImage

Stay tuned for updates (as soon as I buy new batteries for my camera :lol:).

PS (a bit of advertising): this poject is born on the french forum, http://www.techniguitare.com . There are many more interesting project, so visit it ;D
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Silent Fly
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Post by Silent Fly »

Very interesting stuff!

...and very nice sounds. :thumbsup
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moltenmetalburn
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Post by moltenmetalburn »

Nice job thanks for sharing, very convincing sounds there!
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DSV
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Post by DSV »

Glad you like it!

Getting further ... box is drilled and jumpers are soldered on the main PCB.
Image Image Image
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DSV
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Post by DSV »

A little update: resistors, sockets, capacitors and the trimmer have been soldered on the main board.
Image Image Image Image Image
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DSV
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Post by DSV »

Offboard wiring is almost done :
Image Image Image Image Image

I also tested the pre, it works well :D
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DSV
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Post by DSV »

Since the PCB is verified, here it is!
http://www.techniguitare.com/projets/Ch ... preamp.pdf

And here is the parts layout:
Image

:D
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DSV
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Post by DSV »

Finished!

Here are the last photos ...
Image Image Image Image Image Image Image Image

Enjoy!!!
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DSV
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Post by DSV »

Here are some new clips. After listening to them again, here are my impressions:

Two minutes to 2h in the morning: Iron Maiden style. Probably thin. I scooped the mids on this one
Plexi style!: maybe a tad too fizzy
Thunderstruck: instrument placement ain't that good, nor is playing
Sharp dressed man: difficult to capture the ZZ-Top tone, I tried to do my best ...

Comments are welcome!
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SPeter
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Post by SPeter »

Hi everyone, first the killing sample:
http://www.techniguitare.com/projets/Ch ... _delay.mp3
And then enjoy the complete information about this WONDERFUL PREAMP!
http://www.ssguitar.com/index.php?topic=920.0
:D
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