MicroSynth Fuzz

[LaceSensor]

Im debating selling some spare PCBs from the run.
I wouldnt be providing a full build doc, moreso a basic BOM and a drill template for Tayda drilling.
 The PCBs were fabbed with 2 daughter PCB boards for 3PDT true bypass (you only need one, so there is a spare).

I would like to ask £12 GBP for each of these, shipped worldwide. Drop me a line at info@gigaheartsfx.com if this sounds reasonable

here is a proper janky demo on a bass, side by side a real EHX big box BMS - I think they sound remarkably similar if not identical.
The filter is a tad lossy; there is a trim pot on board to balance the outputs when engaged vs disengaged.

[LaceSensor]

[jimilee]

Im debating selling some spare PCBs from the run.
I wouldnt be providing a full build doc, moreso a basic BOM and a drill template for Tayda drilling.
 The PCBs were fabbed with 2 daughter PCB boards for 3PDT true bypass (you only need one, so there is a spare).

I would like to ask £12 GBP for each of these, shipped worldwide. Drop me a line at info@gigaheartsfx.com if this sounds reasonable

here is a proper janky demo on a bass, side by side a real EHX big box BMS - I think they sound remarkably similar if not identical.
The filter is a tad lossy; there is a trim pot on board to balance the outputs when engaged vs disengaged.

I was waiting to hear NIB in that demo. That sounds great.


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[LaceSensor]

PMs sent to interested parties.

[Bret608]

This sounds and looks great! Very much up my alley. PM me if you still have any PCBs. I just got back from a trip to S. Korea so probably missed the boat as it were.

[LaceSensor]

Still a couple unspoken for - I have PM you Bret.
Cheers

[destro]

Very cool. Looks cool, sounds nasty! Email sent.

[LaceSensor]

replied. 2 left

[LaceSensor]

All boards ordered posted. 1 left.

[matmosphere]

Already got mine, thank you sir!

[jwin615]

@LaceSensor, missing the value for R7 in the BOM and it's in the shadow of a cap in your gut shot so I can't reliability band count. Think there's orange brown and black there but not sure...
And man, you pulled out all the odd all resistor values. I think I used 4-5 values for the first time. 😂
There may be a few caps in the BOM that are non-existent. Had to use my fingers and toes to count them so I may be wrong. I'm about 5 caps and R7 away from being done.
Thanks again for sharing this!

[LaceSensor]

R7 is 27k

As for the wierd values, its what the schematic called for I guess

Cheers

[LaceSensor]

My bad for any errors. Ive updated the first page now.

As for missing caps let me know specifically what I have mis-labelled there. thanks

It does jump from C21 to C28 with nothing in between

C28 is added to C19 in parallel. The original part of that filter schematic is not on the original MS (hence the bypass toggle) and is indeed lifted ffrom Aleph Null via a datasheet for a PT2399 delay. Is a multiple feedback Low pass filter. The freuqency can be adjusted via C19 - if you want you can just put a 680pF or whatever your preference is up to about 1.5nF ish and forget C28. I found the 680pF can be a tad limited with bass, its grand with guitar. Hence you can mess around. The pads for C28 could also be used to switch in other caps ?

This was hopefully mostly captured in my build notes, towards the end of the BOM doc

"C19 and C29 are in parallel, and approximate a 680p cap. I found it useful try one cap depending on the tone you prefer. Lower (total) values of C19 and C29 will give "peakier" and harsher treble sounds. Higher values will darken the filter. Try anything from 220p up to 2n2 in total. You can simply put a 680pf cap in either position and call it a day 😊"

[jwin615]

Awesome. Thank you!