Wednesday, May 19, 2021

EARTHQUAKER DEVICES: Acapulco Gold

This is a nice easy one - think it might have been my first IC-based guitar pedal builds.  

The Earthquaker Devices Acapulco Gold is quite the beast.  So loud...  the 22k resistor going to volume 3 helps pull the level down a bit.  It could even be a bit bigger or not there at all if you want something monstrous.

It just does one thing, and it does it pretty well.  If you like 386-based distortions, well, this is one 386 firing straight into another 386.   It’s a Doom box, which is perhaps why it has been compared to a Sunn amp.  The circuits are not even vaguely similar, but I can see where the comparison comes from.

There’s a reasonable amount of room on the board, but given it’s such a small circuit, it hardly matters.  It still easily fits in a 1590B enclosure.   I’d even be tempted to add another row to get the two 10u caps a tad further apart (I have built this using this layout, and they fit just fine).   I replaced the 1u electros with box poly caps just because I felt like it on my last build.


EARTHQUAKER DEVICES - ACAPULCO GOLD

EARTHQUAKER DEVICES: Acapulco Gold, Guitar Effect Vero Layout stripboard layout




EQD ACAPULCO GOLD MODS

It's so loud that some people like to add a 1M pot to control input levels.   Input to pin 3, pin 2 to the regular input on the board, and pin 1 to ground.


EQD ACAPULCO VIDEO DEMO



5 comments:

Anonymous said...

hey, i build this board and i am not sure how to connect it to my switch. i use a pcb for all my switches (https://www.musikding.de/3PDTconnectorpcb) and i am really confused where to solder the connections 9v, BJ, GND,and BO. it would be fine if someone can help me. Thank you very much! greeting from germany. you can send direct information to (sctweidplas(at)gmail.com).

Andrew said...

Hello - have your looked at the wiring diagram on the same page?

https://musikding.de/docs/musikding/3PDTLED/3PDTLEDwire.pdf

Anonymous said...

Hey, thanks for reply. Yes, but I'm not sure where to put the green OUT from the switch PCB. I think it is going to the Poti, right? 9V to 9V. GND to GND, BI to IN is clear for me. Thanks

Anonymous said...

BO = output from the volume pot.

Anonymous said...

Thanks a lot.