Author Topic: Echo Base - a new PT2399 delay  (Read 876582 times)

ppatchmods

Re: Echo Base - a new PT2399 delay
« Reply #280 on: September 23, 2008, 02:17:44 PM »
Thanks Slacker! You talked me down from the ledge! :-\ I'll give it a go and see what happens.
When your life is over, will any of this STUFF really matter?

Auke Haarsma

Re: Echo Base - a new PT2399 delay
« Reply #281 on: September 25, 2008, 10:17:16 AM »
Well, it is not 100% Echo Base... but...

I added the LFO section of the Echo Base to my PT-80 and man... AWESOME. What a great addition!

Thanks Ian!

Auke Haarsma

Re: Echo Base - a new PT2399 delay
« Reply #282 on: September 26, 2008, 02:17:38 PM »
Here's a pic, as you see I made a PCB for the LFO-section:

John Lyons

Re: Echo Base - a new PT2399 delay
« Reply #283 on: September 26, 2008, 02:53:36 PM »
Anyone have any additional soundclips for the Echo Base?
I'd like to add some to my site here.
Clips with the modulation in context would be nice.
Keep em under 1MB please.
Let me know.
thanks!


John

Basic Audio Pedals
www.basicaudio.net/

Tuemmueh

Re: Echo Base - a new PT2399 delay
« Reply #284 on: September 26, 2008, 03:14:35 PM »
Here's a pic, as you see I made a PCB for the LFO-section:

Great! Would you mind to share the layout, as I'm interested in combining the PT-80 with the LFO (and the trail-able-switching also ... but that's another story ;))

Auke Haarsma

Re: Echo Base - a new PT2399 delay
« Reply #285 on: September 26, 2008, 04:47:15 PM »
Sure, I'll prepare the layout and post it any time soon.

Auke Haarsma

Re: Echo Base - a new PT2399 delay
« Reply #286 on: September 26, 2008, 06:02:54 PM »
Here is the PCB to use the EchoBase LFO section on a PT-80 delay. I am pretty sure it will work on a Rebote as well, but I have not tried that.

Just the PCB, size is correct if printed at 600 dpi:


And the layout:

« Last Edit: September 26, 2008, 07:01:10 PM by Auke Haarsma »

Tuemmueh

Re: Echo Base - a new PT2399 delay
« Reply #287 on: September 26, 2008, 06:49:10 PM »
thanks!

jimosity

Re: Echo Base - a new PT2399 delay
« Reply #288 on: September 30, 2008, 10:20:05 PM »
How do I wire it up to have an external feedback loop?
Jim Rodgers
jim@americanhc.com

Valoosj

Re: Echo Base - a new PT2399 delay
« Reply #289 on: October 07, 2008, 05:54:07 PM »
Here's a movie of my Echo Base

http://www.youtube.com/watch?v=dYSLb5HcJtk
Quote from: frequencycentral
You squeezed it into a 1590A - you insane fool!  :icon_mrgreen:
Quote from: Scruffie
Well this... this is just silly... this can't fit in a 1590B... can it? And you're not even using SMD you mad man!

Barcode80

Re: Echo Base - a new PT2399 delay
« Reply #290 on: October 08, 2008, 01:51:44 AM »
so i built one and it sounds great. i built another and though the led switches on and off (which i assume means both the mechanical switch and the 4066 chip are functioning) i get no delay signal. I can also tell the LFO is working because i hear the faint ticking in the background which changes as i increase the rate pot. so here are my thoughts on possible causes:

1) fried pt2399 - i don't think so, but maybe
2) fried tl072 - same as above
3) i've increased the feedback resistor to 30k, which i'm wondering if it may be too high to allow feedback. i don't think this is it either, as i have a momentary switch wired in that puts a 10k in parallel with it, thus causing (at least on my working unit) endless oscillation when functioning. this switch isn't functioning on the new unit.

ideas?

Auke Haarsma

Re: Echo Base - a new PT2399 delay
« Reply #291 on: October 08, 2008, 08:39:50 AM »
do you get any sound at pint 14,15 of the PT2399?

Barcode80

Re: Echo Base - a new PT2399 delay
« Reply #292 on: October 08, 2008, 10:57:49 AM »
do you get any sound at pint 14,15 of the PT2399?
actually, i found it. apparently the voltage regulator was bad and not supplying enough juice to the pt2399. replaced it and now i'm delaying like crazy. :)

audioguy

Re: Echo Base - a new PT2399 delay
« Reply #293 on: October 08, 2008, 01:36:58 PM »
Here is the PCB to use the EchoBase LFO section on a PT-80 delay.

What IC are you using, and have you tried it on a Rebote yet?

slacker

Re: Echo Base - a new PT2399 delay
« Reply #294 on: October 08, 2008, 01:45:19 PM »
A TL072 will work fine for the IC. It will work on any of the PT2399 based delays.

audioguy

Re: Echo Base - a new PT2399 delay
« Reply #295 on: October 08, 2008, 03:22:30 PM »
Cool I'll have to give it a shot!

mth5044

Re: Echo Base - a new PT2399 delay
« Reply #296 on: October 08, 2008, 09:09:15 PM »
Hey, I don't this this was discussed yet, but does the bypass switch have any kind of signal going through it that would be degredated if it was put through a long amount of wire? I'm gonna house this into a box to put ontop of my amp, and I was going to put a remote switch down on the floor via a stereo 3.5mm chord. I haven't really studied the circuit, but I see its coming from a 4066, which I think is used for switching. So as I'm writing this I'm guessing the bypass switch is momentary too? Eh I guess I'll go reread the 15 pages  :icon_redface:

zyxwyvu

Re: Echo Base - a new PT2399 delay
« Reply #297 on: October 08, 2008, 10:11:39 PM »
Hey, I don't this this was discussed yet, but does the bypass switch have any kind of signal going through it that would be degredated if it was put through a long amount of wire? I'm gonna house this into a box to put ontop of my amp, and I was going to put a remote switch down on the floor via a stereo 3.5mm chord. I haven't really studied the circuit, but I see its coming from a 4066, which I think is used for switching. So as I'm writing this I'm guessing the bypass switch is momentary too? Eh I guess I'll go reread the 15 pages  :icon_redface:

You should be able to run the bypass cable through a pretty long cable without any problems. The switch is latching, not momentary.

hendrix2489

Re: Echo Base - a new PT2399 delay
« Reply #298 on: October 09, 2008, 11:06:04 AM »
hello everyone, after looking through all 15 pages, i decided im definitely building this awesome effect.  after looking through im going to build it with a waveshape pot, changing feedback resistor to around 100k, hook up a current limiting resistor and LED to pin 1 of U1 for lfo indicator, and hopefully hook up another pot and switch to switch between short and long delays. does this sound correct, how would i hook up the long/short switch thanks.

Alex S.

slacker

Re: Echo Base - a new PT2399 delay
« Reply #299 on: October 09, 2008, 01:43:40 PM »
...and I was going to put a remote switch down on the floor via a stereo 3.5mm chord. I haven't really studied the circuit, but I see its coming from a 4066, which I think is used for switching. So as I'm writing this I'm guessing the bypass switch is momentary too? Eh I guess I'll go reread the 15 pages  :icon_redface:

That will work fine, the audio signal doesn't go anywhere near the switch. The bypass stomp controls a transistor switch which then switches the 4066 that turns the delay on and off. The switch is latching.

...and hopefully hook up another pot and switch to switch between short and long delays. does this sound correct, how would i hook up the long/short switch thanks.

I'd do it like this. Put the second pot in series with the original one, wired the same way. Then use a SPDT switch and connect the middle lug to where the pots join and the outer lugs to the outside of the pots, like this
           
Pin6----1---Pot-2--Pot--3--    Numbers are switch lugs

That way the will change between the 2 pot values without any break in the connection.
« Last Edit: October 09, 2008, 01:45:53 PM by slacker »