Echo Base - a new PT2399 delay

[Mark Hammer]

Nice work, garcho.  Glad you like the punch-in function.

I hasten to remind folks that it can be located outside of the pedal itself, without difficulty.  A little hole popped in the side of the box for a mini phone jack (or your connector of choice) will allow one to situate a/the momentary switch in another location where one can reach for it in as much haste and urgency as you want without having to worry about hitting anything else with one's steel-toed work boots.

Such momentary buttons are alsoa reason to consider using those trapezoidal boxes that Hammond came out with recently.  Msst folks might look at them with the assumption that the wide side should be the rear skirt, bvut there is nothing wrong with making it thew front skirt, and spacing some footswitches a little farther apart.

[garcho]

No offense, Mr. Hammer, your knowledge and gentlemanliness are part of what makes this the best DIY effects forum on the internet, but Slacker mentioned the momentary switch on page 2 of this thread.  
I love momentary switches, they're good for punching in lots of things: LFO depth, feedback loop, distortion for that one really intense measure, etc. But what could possibly beat a momentary on an Echo Base with tails?! King Tubby is smiling in his grave.

By the way, thanks for posting that enclosure, what an awesome shape! Time to order a few...

[Mark Hammer]

No offense taken.  With so many dozens of pages of posts on this one, I knew I was bound to miss something!

Gotta love King Tubby.  Somewhere in the basement, I have my 7" copy of  Augustus Pablo singing "Baby, I Love You So", which I seem to recall has a mix of "KT Meets the Rockers Uptown" on the flip side.  Love that piercing echo.  Replace the 100nf cap just after the repeat control with a smaller value, like 22nf or even 10nf for a progressive trimming of bass and mids on each repeat for that rub-a-dub-dub sound.

I have to order me a couple of those trapezoid boxes too.

[garcho]

Replace the 100nf cap just after the repeat control with a smaller value, like 22nf or even 10nf for a progressive trimming of bass and mids on each repeat for that rub-a-dub-dub sound.

Thanks for the tip!

[Pyr0]

Thanks Slacker for the great circuit.
Finally got mine debugged and working (vero layout).

here's the finished unit.



Alan

[askwho69]

NICE BUILD! can you post the whole schematic "MOD" thank you

[slacker]

@Garcho and Pyr0, nice builds.

[davent]

Haven't had a chance or nerve to test it out yet but the voltages seem to be in order.


dave

[davent]

Tried it out today and it's a blast, haven't had an analogue delay to play with before. Had the 560 in wrong way around (socketed) so fixed that and have the time and depth pots wired backwards (duh)  no big deal. Nothing i can add that hasn't been said so thanks Ian for a great project and babysitting it through 60 odd pages and counting.

All the best!
dave

[CodeMonk]

Is the link to the schematic in the first post the most current one?

I ask because I am going to build another one sometime this year.
But due to size constraints, its going  to be SMD.

Probably won't be done until near the end of the year (2012) though.

[slacker]

I would build this version http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/album170/echobaserev2.png.html?g2_imageViewsIndex=1 it has a number of improvements over the original. The buffers are quieter, the LED flashes to indicate modulation speed, and the modulation depth pot causes less interaction with the delay time.
I'd be interesting in seeing an SMD version

[CodeMonk]

I would build this version http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/album170/echobaserev2.png.html?g2_imageViewsIndex=1 it has a number of improvements over the original. The buffers are quieter, the LED flashes to indicate modulation speed, and the modulation depth pot causes less interaction with the delay time.
I'd be interesting in seeing an SMD version

Yeah, me too
But like I said, probably be near the end of the year (2012).
I've never designed an SMD PCB, But I have built many, many of them by hand.
By the time I get started on it, it will likely change. Or Not.
I'll build a regular one first though. And maybe mess with it (I have a hard time leaving any designs alone, unless I'm going for authentic vintage).

[Shawbrook]

I would build this version http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/album170/echobaserev2.png.html?g2_imageViewsIndex=1 it has a number of improvements over the original. The buffers are quieter, the LED flashes to indicate modulation speed, and the modulation depth pot causes less interaction with the delay time.
I'd be interesting in seeing an SMD version

Could someone give me the vero layout of the newest version (with the three switches)? Thanks.  

[deadastronaut]

^ and the pcb layout too?..

[Pyr0]

Could someone give me the vero layout of the newest version (with the three switches)? Thanks.  

I used the one from Sabrotone, Harald really does great vero layouts. I'm not sure if it's the latest, but it has options for most of the mods, I left out the humbucker switch on mine,

http://www.sabrotone.com/wp-content/uploads/2011/05/EchoBase.gif

well worth building
Alan

[slacker]

Cool, never knew that existed, thanks for posting it and thanks to Harald for doing it. Yeah that's the latest version, same as Taylor's pcb version.

[Shawbrook]

Could someone give me the vero layout of the newest version (with the three switches)? Thanks.  

I used the one from Sabrotone, Harald really does great vero layouts. I'm not sure if it's the latest, but it has options for most of the mods, I left out the humbucker switch on mine,

http://www.sabrotone.com/wp-content/uploads/2011/05/EchoBase.gif

well worth building
Alan

What exactly do the feedback and humbucker switches do?

[Pyr0]

Humbucker option is supposed to make the pedal behave better with humbucking pickups, but I didnt really notice much difference.
The feedback switch sends it into unstable self oscillations, I have a momentary footswitch for the feedback sw.

[Shawbrook]

Thank you, also is this PCB of the final version: http://musicpcb.com/pcbs/echo-base-delay/ ?

And also (probably a noob question) how do I add a feedback loop?

[slacker]

Yeah that pcb is the final version, very nice it is too. There's details for adding various fx loops/feedback loops in this thread search back through it.