madbeanpedals::forum

Projects => Build Reports => Topic started by: rockola on November 22, 2020, 03:15:42 PM

Title: SMD Echoplex preamp
Post by: rockola on November 22, 2020, 03:15:42 PM
Here's my latest build, all-SMD Echoplex preamp in a box that's slightly smaller than a 1590LB. KiCAD files & Gerbers @ https://github.com/rockola/pimentero

(https://raw.githubusercontent.com/rockola/pimentero/master/images/pimentero-v0.2-front.png) (https://github.com/rockola/pimentero) (https://raw.githubusercontent.com/rockola/pimentero/master/images/pimentero-v0.2-back.png) (https://github.com/rockola/pimentero)

Top in glorious British Racing Green. No LED for now, might be a good idea to put one in later though.

(https://ola.rinta-koski.net/Pedals/Pimentero/400xfront.jpg) (https://ola.rinta-koski.net/Pedals/Pimentero/front.jpg)

Back.

(https://ola.rinta-koski.net/Pedals/Pimentero/400xback.jpg) (https://ola.rinta-koski.net/Pedals/Pimentero/back.jpg)

Gutshot. Sorry about the blurriness, it was tricky to get the phone camera to focus.

(https://ola.rinta-koski.net/Pedals/Pimentero/400xgutshot.jpg) (https://ola.rinta-koski.net/Pedals/Pimentero/gutshot.jpg)

Title: Re: SMD Echoplex preamp
Post by: dawson on November 22, 2020, 03:45:31 PM
Gee- I thought the FatPants Jr. PCB was tiny

This is awesome!
Title: Re: SMD Echoplex preamp
Post by: cooder on November 22, 2020, 08:14:23 PM
Squueeeze! Nice!
Title: Re: SMD Echoplex preamp
Post by: gordo on November 22, 2020, 08:51:23 PM
That's so cool.
Title: Re: SMD Echoplex preamp
Post by: alanp on November 23, 2020, 04:23:40 AM
You crazy man.
Title: Re: SMD Echoplex preamp
Post by: rockola on November 23, 2020, 06:06:50 AM
Quote from: alanp on November 23, 2020, 04:23:40 AM
You crazy man.
Yep, this wasn't exactly an exercise in sanity, or practicality. Making the pot side-mounted would make this a lot more stompable. Maybe next time.

Title: Re: SMD Echoplex preamp
Post by: gordo on November 23, 2020, 01:26:36 PM
Something I've thought of doing on a lot of my pedals is cutting down the pot shaft and just leaving a flatblade screw driver slot in the top so the knobs don't move just by getting bumped.  It would look pretty f-ugly but functional.
Title: Re: SMD Echoplex preamp
Post by: Aentons on November 23, 2020, 01:41:59 PM
Quote from: gordo on November 23, 2020, 01:26:36 PM
Something I've thought of doing on a lot of my pedals is cutting down the pot shaft and just leaving a flatblade screw driver slot in the top so the knobs don't move just by getting bumped.  It would look pretty f-ugly but functional.

I've been staring at this for years trying to figure out how to do it. Looks pretty kick-a** to me.
(https://blackstoneappliances.com/Blackstone-Mosfet-Overdrive.jpg)
Title: Re: SMD Echoplex preamp
Post by: alanp on November 23, 2020, 03:48:11 PM
Quote from: gordo on November 23, 2020, 01:26:36 PM
Something I've thought of doing on a lot of my pedals is cutting down the pot shaft and just leaving a flatblade screw driver slot in the top so the knobs don't move just by getting bumped.  It would look pretty f-ugly but functional.

Make the slot of the right size to be turned by a guitar pick 8)
Title: Re: SMD Echoplex preamp
Post by: thomasha on November 23, 2020, 10:33:14 PM
That really looks nice, no gut shots?
Title: Re: SMD Echoplex preamp
Post by: rockola on November 24, 2020, 06:15:36 AM
Quote from: thomasha on November 23, 2020, 10:33:14 PM
That really looks nice, no gut shots?
Cheers Thomas, I was inspired by your incredible 1590LB work, this is hardly a THT flanger with 6 knobs though.

Here's a shot of the wiring mess. The PCB is tucked nicely to the side.

(https://ola.rinta-koski.net/Pedals/Pimentero/400xguts2.jpg) (https://ola.rinta-koski.net/Pedals/Pimentero/guts2.jpg)

(Edit: I guess you meant gut shots of the MOSFET Overdrive  :) would also like to see them)
Title: Re: SMD Echoplex preamp
Post by: Aentons on November 24, 2020, 02:17:57 PM
Quote from: thomasha on November 23, 2020, 10:33:14 PM
That really looks nice, no gut shots?

Oh sorry, It's not one of mine (I wish). Here is a thread with some gut shots, but it doesn't reveal too much

https://www.tdpri.com/threads/blackstone-appliances-mosfet-overdrive-owners-club.386115/

Edit: looks like the pots may just be standard right-angle 9mm pcb pin type with the shafts cut short
Title: Re: SMD Echoplex preamp
Post by: davent on November 24, 2020, 05:42:44 PM
Quote from: Aentons on November 23, 2020, 01:41:59 PM
Quote from: gordo on November 23, 2020, 01:26:36 PM
Something I've thought of doing on a lot of my pedals is cutting down the pot shaft and just leaving a flatblade screw driver slot in the top so the knobs don't move just by getting bumped.  It would look pretty f-ugly but functional.

I've been staring at this for years trying to figure out how to do it. Looks pretty kick-a** to me.
(https://blackstoneappliances.com/Blackstone-Mosfet-Overdrive.jpg)

I've done that with bias pots for a guitar amp, pot shafts chopped and slotted with a cut off disc in a Dremel. My guess here is the two screws hold a plate that the five pots are mounted to.
dave
Title: Re: SMD Echoplex preamp
Post by: diablochris6 on November 26, 2020, 12:06:27 AM
Very slick layout!