Author Topic: Echo Base - a new PT2399 delay  (Read 903682 times)

bent

Re: Echo Base - a new PT2399 delay
« Reply #360 on: December 18, 2008, 09:48:35 PM »
just a hint, if it could help... :icon_wink:

i was having trouble with the speed pot, it seem's to do nothing on the sound....after spending lot of time to debug, change pot, verify evething...i found out that the problem was the battery....a battery running at +/- 7.5 volts makes the speed not fonctionnary .... i put a new 9 volt and "voila"...problem sovled, evrything works as normal....

bent

Long live the music.....

returntable

Re: Echo Base - a new PT2399 delay
« Reply #361 on: December 19, 2008, 06:06:01 PM »
what is the "range" of the waveshaper mod? I'd like to add that..but..what kind of additional waveforms could I get with this mod?

The "stock" LFO Waveform is a Triangle. The Waveshape Mod allows you to blend between a triangle and a squarewave.
The squarewave LFO is pretty cool, because it adds kind of pitchshifting effects to the delay signal.
"the earth is not a flat screen"
-Saul Williams-

bent

Re: Echo Base - a new PT2399 delay
« Reply #362 on: December 21, 2008, 11:56:26 AM »
i have a little problem....

there's a little "tic...tic...tic" in the sound that goes faster or slower when i turn the speed pot....

only mod made is the wave pot 25kb....

anyone have a clue?

bent
Long live the music.....

Barcode80

Re: Echo Base - a new PT2399 delay
« Reply #363 on: December 22, 2008, 12:00:34 AM »
i have a little problem....

there's a little "tic...tic...tic" in the sound that goes faster or slower when i turn the speed pot....

only mod made is the wave pot 25kb....

anyone have a clue?

bent

see earlier in the thread on ways to reduce noise, it's just your LFO ticking. It should in fact change with the speed pot.

sovtek50

Re: Echo Base - a new PT2399 delay
« Reply #364 on: December 24, 2008, 05:52:01 PM »
The status LED function is reversed, means it's off when the effect is on and vice versa.
Anybody got an idea what that could be?

That's strange, which layout have you used?

I used the vero layout. Lately, the tail/boss switch ain't working either. The unit seems to be working perfectly, except for the switching... hmmm...
A circuit a day keeps the therapist away.

Valoosj

Re: Echo Base - a new PT2399 delay
« Reply #365 on: December 25, 2008, 02:52:44 PM »
I made a new film showing my echo base and some settings.
http://www.youtube.com/watch?v=nG0SCmy4wRU
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!

Slade

Re: Echo Base - a new PT2399 delay
« Reply #366 on: December 30, 2008, 06:52:09 PM »
i have a little problem....

there's a little "tic...tic...tic" in the sound that goes faster or slower when i turn the speed pot....

only mod made is the wave pot 25kb....

anyone have a clue?

bent
I had the same problem, it was more notorious with distorsion after delay, i simply solved it by using Polyester Box caps (bought at RS..) and changing the 100nF capacitor between lugs 11 and 12 of the PT2399 for a 220nF cap.
Hope this can help you, at least my tic is now gone... ;)

BTW, i used NE5532 ICs for LFO U1 and Out.

gigimarga

Re: Echo Base - a new PT2399 delay
« Reply #367 on: December 31, 2008, 02:19:40 AM »
Hello!

What's the Waveshape mod for?
I did it, but i can't hear major differences with it :D

And what's a Modulation on/off switch for?

returntable

Re: Echo Base - a new PT2399 delay
« Reply #368 on: January 01, 2009, 09:36:00 AM »
maybe next time, before you post a question, you should try to search and read through the thread for an answer...
Only 5 Posts before your question I explained it.
"the earth is not a flat screen"
-Saul Williams-

gigimarga

Re: Echo Base - a new PT2399 delay
« Reply #369 on: January 01, 2009, 09:48:49 AM »
maybe next time, before you post a question, you should try to search and read through the thread for an answer...
Only 5 Posts before your question I explained it.

Sorry...it's a very long topic and i didn't read all carefully :(...is there a problem if i used a 22K linear pot instead of 25K?

Slade

Re: Echo Base - a new PT2399 delay
« Reply #370 on: January 01, 2009, 12:12:24 PM »
It will be better if you use a 50k linear pot, the effect will be more notorious.
Good Luck ;)

gigimarga

Re: Echo Base - a new PT2399 delay
« Reply #371 on: January 01, 2009, 03:21:43 PM »
Thx Slade...i will try these days!

gigimarga

Re: Echo Base - a new PT2399 delay
« Reply #372 on: January 02, 2009, 04:28:22 AM »
It will be better if you use a 50k linear pot, the effect will be more notorious.
Good Luck ;)

Thx a lot Slade for this advice...now the effect of the pot it's obviously stronger!

Slade

Re: Echo Base - a new PT2399 delay
« Reply #373 on: January 02, 2009, 06:22:33 PM »
You're welcome ;)
Now post some demos! ;D

bent

Re: Echo Base - a new PT2399 delay
« Reply #374 on: January 03, 2009, 02:52:30 PM »
i have a little problem....

there's a little "tic...tic...tic" in the sound that goes faster or slower when i turn the speed pot....

only mod made is the wave pot 25kb....

anyone have a clue?

bent
I had the same problem, it was more notorious with distorsion after delay, i simply solved it by using Polyester Box caps (bought at RS..) and changing the 100nF capacitor between lugs 11 and 12 of the PT2399 for a 220nF cap.
Hope this can help you, at least my tic is now gone... ;)

BTW, i used NE5532 ICs for LFO U1 and Out.
thank's SLADE, i try it before...
i change between lugs 11 and 12 to 560nF (see earlier post), and between lug 9 and 10 to 220nf, didn't change anything...i try with a mc4558 in both place, and still nothing change...
still have this f**** tic...tic...tic...
i use polyester box caps.....
 :'( :'( :'( :'( :'( :'( :'( :'( :'( :'( :'(
great project, but can't used it....
bent
Long live the music.....

Valoosj

Re: Echo Base - a new PT2399 delay
« Reply #375 on: January 04, 2009, 09:04:53 AM »

The method you've used to switch the modulation on and off will work but you might get some strange noises when it switches. Basically, if the switch breaks before it makes there will momentarily be an infinite resistance between pin 6 and ground which will cause the delay to switch to a very long delay time causing a nasty sounding spike in the signal.

A better way to do it is either to have the switch ground the base of the BC560 or make it short out C5 both of these will kill the modulation cleanly. I prefer to short C5.



To short C5, does this mean you would just add a switch between C5 and R6/3? (I'm referring to simons' schematic on this one)
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!

slacker

Re: Echo Base - a new PT2399 delay
« Reply #376 on: January 04, 2009, 09:22:01 AM »
Yeah that's right. One side of the the switch goes to R7/C5 and the other side goes to C5/R6/R3.

slacker

Re: Echo Base - a new PT2399 delay
« Reply #377 on: January 04, 2009, 09:24:24 AM »
i have a little problem....

there's a little "tic...tic...tic" in the sound that goes faster or slower when i turn the speed pot....

only mod made is the wave pot 25kb....

anyone have a clue?

bent

Is this ticking all the time, in bypass as well as when the delay is on?
What happens if you remove the wave shape pot?

Fuzz Aldryn

Re: Echo Base - a new PT2399 delay
« Reply #378 on: January 04, 2009, 09:38:54 AM »
i have a little problem....

there's a little "tic...tic...tic" in the sound that goes faster or slower when i turn the speed pot....

only mod made is the wave pot 25kb....

anyone have a clue?

bent

Is this ticking all the time, in bypass as well as when the delay is on?
What happens if you remove the wave shape pot?

Hi slacker,

got the same problem as mentioned above. In my case it still tics in bypass. But for me it's not that worse, because youn can barely hear until you put a distortion device after the delay., which I never do. Strange but true: If I turn another device in front of it on e.g. an Orange Squeezer the tic is gone? Might something to do with grounding?

Regards
Helge

gigimarga

Re: Echo Base - a new PT2399 delay
« Reply #379 on: January 04, 2009, 10:48:17 AM »
You're welcome ;)
Now post some demos! ;D

Thx a lot!
I have no microphone, so my clips will sound crappy :D, but i will try as soon as possible.