Author Topic: Echo Base - a new PT2399 delay  (Read 902843 times)

omarvolta

Re: Echo Base - a new PT2399 delay
« Reply #160 on: May 20, 2008, 01:43:05 PM »
by short out do you mean simply lifting one leg of the cap(1uf) or to bridge both legs together(so that both pins 1 and 2 bridge)??

slacker

Re: Echo Base - a new PT2399 delay
« Reply #161 on: May 20, 2008, 02:23:46 PM »
Just bridge pins 1 and 2 together.

omarvolta

Re: Echo Base - a new PT2399 delay
« Reply #162 on: May 20, 2008, 03:44:01 PM »
got it, thank you very much!

jmasciswannabe

Re: Echo Base - a new PT2399 delay
« Reply #163 on: May 20, 2008, 10:47:12 PM »
Built it and sounds great. I dig the lfo better than the commonsound add on one. I'll have to try the waveshaper mod. I used the anonymousface layout. For some reason i thought all the ics faced the same direction and fried one of the tl072s. Better that than the pt2399! So be careful! Anyway, I am in the process of boxing this up and have got a rad graphic and plan on clearcoating it. I would like to keep it true to the original and call it ECHO BASE in the same font thats on the schematic. Anyone know the font name?

Thanks for a fun build slacker and anonymousface!!
....the staircase had one too many steps

slacker

Re: Echo Base - a new PT2399 delay
« Reply #164 on: May 21, 2008, 08:25:03 AM »
Cheers, I can't remember what the font is called off the top of my head. I've still got it on my PC so I'll have a look for it later..

jmasciswannabe

Re: Echo Base - a new PT2399 delay
« Reply #165 on: May 21, 2008, 10:01:45 PM »
Thanks, I'll be sure to check back.
....the staircase had one too many steps

slacker

Re: Echo Base - a new PT2399 delay
« Reply #166 on: May 22, 2008, 08:32:53 AM »
It's called checkbook, I think I got it from here http://www.1001freefonts.com/checkbook.htm.

omarvolta

Re: Echo Base - a new PT2399 delay
« Reply #167 on: May 25, 2008, 07:01:37 PM »
ok, i'm back with just one more question. Since the wet signal is being mixed to the dry signal via the volume pot, how could I add a pot to control the volume of only dry signal?? can it be done??
« Last Edit: May 25, 2008, 07:04:32 PM by omarvolta »

jmasciswannabe

Re: Echo Base - a new PT2399 delay
« Reply #168 on: May 25, 2008, 09:29:17 PM »
I believe you can control the dry volume by wiring up a pot for the 10k resistor between pin 1 and pin 6 of the u3 TLO72. Slacker, thanks for the font!
....the staircase had one too many steps

slacker

Re: Echo Base - a new PT2399 delay
« Reply #169 on: May 26, 2008, 06:17:25 AM »
Yeah that would work, putting say a 100k pot in series with the 10k would let you reduce the dry level. If you also changed the 10k to a smaller value that would let you increase the dry volume.
The only problem with doing this is that the dry signal is present when the effect is bypassed so the dry volume pot would affect the bypassed volume. There's no easy way to change the dry volume only when the effect is engaged.

loss1234

Re: Echo Base - a new PT2399 delay
« Reply #170 on: May 26, 2008, 08:39:25 AM »
of course, you could hook up a volume pot mod so you could control the mix in realtime, and then put it back to 10 for the bypass.

right?

slacker

Re: Echo Base - a new PT2399 delay
« Reply #171 on: May 26, 2008, 08:59:38 AM »
Thinking about it, if you put a pot in series with the 10k resistor as mentioned above you could then use a switch to short out the pot when you bypass the effect that would return the volume level to unity.
You could do this by using a DPDT switch for the bypass switch and use the spare halve to short out the pot.

omarvolta

Re: Echo Base - a new PT2399 delay
« Reply #172 on: May 26, 2008, 11:24:17 AM »
great! i'll give it a try then and see how it works out. thanks a lot!

Valoosj

Re: Echo Base - a new PT2399 delay
« Reply #173 on: June 06, 2008, 07:29:45 PM »
Hey Ian

Beginning of Juli I'm going to try the extra time mod, and let you know how it works out.
In the meantime I was thinking that it might come handy if you were to make a settings list on how to get the chorus, pitch bending,...
After listening to the clips in the first post and on page two I wonder how you are able to get all these nice sounds.
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!

soggybag

Re: Echo Base - a new PT2399 delay
« Reply #174 on: June 06, 2008, 10:36:57 PM »
I have been meaning to build the Echo Base for a while now. I just started last night. I'm using Junkworks layout here: http://blogs.yahoo.co.jp/anonymousfacelesscoward/19192939.html

Valoosj

Re: Echo Base - a new PT2399 delay
« Reply #175 on: June 07, 2008, 05:34:20 PM »
I'll be using that same layout. It's postponed until my exams are finished though.
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!

Tuemmueh

Re: Echo Base - a new PT2399 delay
« Reply #176 on: June 07, 2008, 07:34:15 PM »
Hi there,

sorry, but I'm not able to understand all the tone-filtering and shaping in this circuit, maybe someone can point me to the parts where most of the filtering is done so I might to experiment with tone-controll for the delays?!

Thanks,
Timm

Dimitree

Re: Echo Base - a new PT2399 delay
« Reply #177 on: July 08, 2008, 12:35:54 PM »
Hi..it is possible to add a loop send-return between the 20K resistor and the 100n cap across the pin 2 of the feedback pot? In this way, connecting an effect in this loop, this effects influences the repeats always more..right? If we use, for example, an octave up in the loop, the first repeat would be 1oct up, the second would be 2oct up, etc.. (obviously the feedback pot should be set low, with a few of repeats, otherwise the pitch grow to much)

Another question: why there are 2 1N4148 across the feedback pot?

thanks so much!
Dimitri
« Last Edit: July 08, 2008, 12:38:17 PM by Dimitree »

slacker

Re: Echo Base - a new PT2399 delay
« Reply #178 on: July 09, 2008, 12:20:30 PM »
Adding a send return where you've suggested would work fine. You might want to add a buffer to the return and possibly one to the send but it will probably be fine without any.
The diodes don't really do anything unless you turn the feedback pot up very high then they clip the signal and stop the repeats getting too loud. The pedal will still do the usual feedback sounds you get from delays but the volume stays at a more usable level.
« Last Edit: July 09, 2008, 12:48:46 PM by slacker »

gutsofgold

Re: Echo Base - a new PT2399 delay
« Reply #179 on: July 09, 2008, 02:48:57 PM »
The diodes don't really do anything unless you turn the feedback pot up very high then they clip the signal and stop the repeats getting too loud. The pedal will still do the usual feedback sounds you get from delays but the volume stays at a more usable level.

I added a "feedback" switch and pot to my Rebote 2, could I also put two diodes on the pot as you did here to control the high volume with feedback?

Here is how I have it wired up...
http://i27.photobucket.com/albums/c153/kahelia/pedalia/Dealy_mom_feedback.jpg