Echo Base - a new PT2399 delay

[Jerem]

Thank for your answer. I built 2 echobase delay and the tails mode don't work on my 2 stompbox : I used some CD4066BE for IC4, does the problem could be this one?

[Jerem]

I read another time explanation of the stompbox on the beguining of this thread?. I believe that my tails problem is due to the truebypass I did : I connected together bypass point 1 and 2 and make the truebypass with a 3DPT footswitch, that it?

[slacker]

Yes if you make it true bypass then tails won't work.

[cctsim]

I've just managed to package my echo base and I must say it sounds terrific, many thanks Slacker.

I was dreading debugging given the size of the build but surprisingly it worked first time. I integrated on the strip board most of the mods in version 2.
In hindsight, the only mod I won't use is the LED flashing at modulation rate. It's not "dramatic" enough for my taste but unfortunately I drilled an
extra hole for this prior testing.

Anyway, may thanks again for this wonderful circuit.

[askwho69]

Why not contented with the Mechanical bypass anyway? its way MUCH better than true bypass in fact Echobase bypass makes the signal clear and boost its clean...  the true bypass sucks tone in long cable 20 meters rather than buffered bypass

[poodlebra]

i just stuck a true-bypass dpdt toggle switch for when it isn't being used on my pedalboard. no worries. simples.

[GodSaveMetal]

I made a new layout for the Little Angel, incl. the dry/wet mod and the pin 6 potentiometer mod. Should theoretically fit into a 1590a, too. Will post it when I have time.

Were you put that? layout PCB and all?   please man where?

[poodlebra]

has anyone built a working one with this AFC layout? i'm just getting clean signal 

http://blogs.yahoo.co.jp/anonymousfacelesscoward/23693577.html

[deadastronaut]

@poodle :  yep ive built that one..worked fine, first go...

i noticed you stuck a toggle for bypass on there,( from comment above)...could that have something to do with your problem?.or was it working ok then.....just a guess..


edit whoops, i built this one! the version you built has more jumpers (up the sides) so no sorry...

http://www.diystompboxes.com/smfforum/index.php?topic=60662.msg798276#msg798276

[poodlebra]

yeah, it's the super micro mini version that'll fit in an mxr-size box. i dpdt bypassed my original vero build. i need two of these on my board 

[slacker]

has anyone built a working one with this AFC layout? i'm just getting clean signal 

http://blogs.yahoo.co.jp/anonymousfacelesscoward/23693577.html

Yes people have used that layout. Did you put the opamps in the right way round, they are upsidedown compared to the PT2399 and the CD4066.

[poodlebra]

yeah, they're the right way. i guess its a couple of long nights with the MM.

[slacker]

If it passes clean signal then the problem is probably round the right hand side of the PT2399. Audio probe pin 15 to see if the signal is getting to the PT2399 and pin 14 to see if it's getting out of it, that will give you somewhere to start looking.

[modallaire]

I Slacker, first of all, thanks for all the work you did here.  It's amazing.  I ordered pretty much all the parts I need to build a couple of the Echobase pedal for me and a friend and I ordered one pcb from Taylor to add some mods.  However, I intended to build the second pedal on a veroboard since I already have a bunch of those.  My problem is I'm having trouble implementing the new buffer (as of 30/3/2010 schematic) on the veroboard layout.  Is there a revised version of the vero layout?  Or if anyone could help me with this since I'm not absolutely sure about what parts to change and how to connect the new buffer.

Thanks for any help,

Marc

[slacker]

Hi Marc

As far as I know there's isn't a vero layout for version 2, I keep meaning to do one but I haven't got round to it yet.
Here's quick snippet of the layout showing the changes for the new buffer, hopefully it makes sense.

[modallaire]

Thanks, that's exactly what I needed.  BTW, what king of software are you using for the vero layout?  It pretty neat.

[askwho69]

has anyone built a working one with this AFC layout? i'm just getting clean signal  

http://blogs.yahoo.co.jp/anonymousfacelesscoward/23693577.html

What's the difference between the 2 layout? why is said updated? oops just saw the 104 cap through depth mod...

[slacker]

Thanks, that's exactly what I needed.  BTW, what king of software are you using for the vero layout?  It pretty neat.

Cool hope it works out. I just do my layouts using a graphics program, I use the GIMP but any would do. The components are some templates I found somewhere as is the board background, the components are just copy and pasted on to the board and the text and everything else added on top.

[cctsim]

Draft strip board that I used for my build including most mods



Vref filtering:
R50 = 47 Ohm
C50 = 47 uF

DC blocking capacitor for LFO output:
C51 = 10 uF

Anti tick capacitor:
C52 = 2.2 uF

New buffers:
R1 = 1 M Ohm
R2 = 1 M ohm
R3 = 3.3 k Ohm

[mr_deadmaxxx]

@slacker

what's the usual knob settings so that the echo base will work like a chorus-type pedal?