Author Topic: "Little Angel" - Super Simple PT2399 Mini Chorus  (Read 297937 times)

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Govmnt_Lacky

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #560 on: March 17, 2011, 04:20:55 AM »


Another nice layout GSM. You might want to edit your Capacitor values as some of them look to be missing information OR are labeled wrong (pF instead of uF)
A Veteran is someone who, at one point in his or her life, wrote a blank check made payable to The United States of America
for an amount of ‘up to and including my life.’

GodSaveMetal

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #561 on: March 17, 2011, 12:30:40 PM »
Awesome man, thank you so much, did you build it yet with your PCB
Does everything work OK

I don't build this yet but is based on the idea of Earthscum!!!!!! but the version whit two potentiometers it's great; prove this a notice what happends!!!!!!!!!!!!

GodSaveMetal

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #562 on: March 17, 2011, 12:44:01 PM »
Another oops!!!!! some tipping error labeled on C6 is 0.1uF the correction is in this layout:

Thanks Govmnt_Lacky for your observations!!! something else please!!!!!

ppaappoo

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #563 on: March 19, 2011, 11:47:57 AM »
Hi, i make the chorus but don't works, only sound the clean guitar. I used this PCB by Slade on page 8



This is may board



And this are my values compared to the frecuency central ones.

Power supply 8.93V
Tester range 20VDC

TL072

1: 1.4 to 7.3
2: 2.7 to 3.3
3: 2.6 to 3.3
4: 0v
5: 4.79
6. 4.95
7: 4.95
8: 8.93


PT2399

1: 4.95
2: 2.2 to 2.5
3: 0
4: 0
5: 4.94
6: 0.55
7: 0
8: 4.55
9: 4.78
10: 0.33
11 through to 16:  2.4 (slight movement)

Frecuency central

NE5532

1:  0.13 to 4.9
2:  2.9 to 3.2
3:  2.7 to 3.1
4:  0v
5:  4.79
6.  4.9
7:  5.14
8:  9


PT2399

1:  5
2:  2.38 to 2.42
3:  0
4:  0
5:  2.75
6:  0.61
7:  0.88
8:  0.88
9 through to 16:  2.41 (slight movement)


Govmnt_Lacky

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #564 on: March 19, 2011, 12:50:35 PM »
This is may board



My advice would be to GET RID of that 100 ohm resistor off of Pin 6 of the PT2399 (the one between the 2399 and the voltage regulator) and replace it with a 1K ohm resistor. There has been discussion in this thread about the 100 ohm resistor causing problems.

Good Luck  ;D
A Veteran is someone who, at one point in his or her life, wrote a blank check made payable to The United States of America
for an amount of ‘up to and including my life.’

GodSaveMetal

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #565 on: March 19, 2011, 01:30:24 PM »
OK that's 100R resistor causes problems????? if i changes with the 1K you proposed will work fine????? I probe the original layout and changes the PT2399 and It's fine with the 100R resistor!!!! the IC will be that causes problem????? It is wright o no????

Govmnt_Lacky

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #566 on: March 19, 2011, 01:40:56 PM »
OK that's 100R resistor causes problems????? if i changes with the 1K you proposed will work fine????? I probe the original layout and changes the PT2399 and It's fine with the 100R resistor!!!! the IC will be that causes problem????? It is wright o no????

You need to go back and read Replys 435 through 450. Might clear it up for you.

Good Luck  ;D
A Veteran is someone who, at one point in his or her life, wrote a blank check made payable to The United States of America
for an amount of ‘up to and including my life.’

bluesman1218

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #567 on: March 19, 2011, 02:42:53 PM »
Hi, i make the chorus but don't works, only sound the clean guitar.
And this are my values compared to the frecuency central ones.

Power supply 8.93V
Tester range 20VDC

TL072

1: 1.4 to 7.3
2: 2.7 to 3.3
3: 2.6 to 3.3
4: 0v
5: 4.79
6. 4.95
7: 4.95
8: 8.93


PT2399

1: 4.95
2: 2.2 to 2.5
3: 0
4: 0
5: 4.94
6: 0.55
7: 0
8: 4.55
9: 4.78
10: 0.33
11 through to 16:  2.4 (slight movement)

Frecuency central

NE5532

1:  0.13 to 4.9
2:  2.9 to 3.2
3:  2.7 to 3.1
4:  0v
5:  4.79
6.  4.9
7:  5.14
8:  9


PT2399

1:  5
2:  2.38 to 2.42
3:  0
4:  0
5:  2.75
6:  0.61
7:  0.88
8:  0.88
9 through to 16:  2.41 (slight movement)



I had a similar problem with my last build. Here's what it boiled down to for me -
1. make sure the 100R is 1k - it has to do with the PT2399 locking up
2. check the 330K behind the voltage regulator - mine drifted in value
3. check the 1meg from pin 7 on the opamp

In bypass. everything was fine, but no signal at all with the effect on. I found that when I touched the back of the PCB in the output path, I got hum .
I also a - touched up my solder connections
        b - checked every solder joint and trace for continuity and solder bridges
The end result was #3 above
#2 above took care of my voltage readings

Hope this helps. I was very pleased with the build once it was working.
It's all about the tone!
Steve

POPA - Plain Old Power Attenuator AVAILABLE for PURCHASE soon!
Silvertone 1482 rebuilt - switchable Tweed, tube reverb, Baxandall + / Little Angel Chorus build, tons of Modded pedals

ppaappoo

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #568 on: March 19, 2011, 03:27:07 PM »
i changed R1 (100R) to 1K and the effect becomes to work but the depth pot only acts at the end, i used a 470k one
« Last Edit: March 19, 2011, 03:33:00 PM by ppaappoo »

Govmnt_Lacky

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #569 on: March 19, 2011, 03:30:30 PM »
i change R1 (100R) to 1K and the effect became work but the depth pot only acts at the end. i use a 470k one

This was also addressed in this thread. Some people (including me) opted to use a 100K pot because the effect was only working during the last little bit of the 470K pot rotation (the last 100K or so)
Rick however, voiced his opinion about this saying that he liked the "doubling" effect that the 470K pot gave when it was in use.
It is all in this thread.... just gotta find it.  ;)

Good to hear you got it working though  ;D
A Veteran is someone who, at one point in his or her life, wrote a blank check made payable to The United States of America
for an amount of ‘up to and including my life.’

ppaappoo

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #570 on: March 19, 2011, 03:34:57 PM »
yes, i'll change the depth pot and adjust R1 to my teste.

So, for the next builders:
DEPTH POT ---> 100k
R1 ---> 1k to 10k or 22k
« Last Edit: March 19, 2011, 03:37:02 PM by ppaappoo »

GodSaveMetal

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #571 on: March 19, 2011, 03:48:15 PM »
yes, I'll change the depth pot and adjust R1 to my taste.

So, for the next builders:
DEPTH POT ---> 100k
R1 ---> 1k to 10k or 22k
OK OK!!! that's fine are you sure for change the 100R for that's values??? what happends??? now your pedal is in functions???

ppaappoo

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #572 on: March 19, 2011, 08:17:11 PM »
1K for R1 it's ok,you olso can use a 5k pot in series with 1k resistor to make a delay control.

the chorus works! thanks to all

ppaappoo

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #573 on: March 20, 2011, 08:53:43 AM »
I have a question, what type of wave generated by lfo?
if someone had a function generator may inject a specific signal on pin 2 of the pt2399, and compare how respond the chorus.

GodSaveMetal

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #574 on: March 20, 2011, 01:04:13 PM »
1K for R1 it's ok,you olso can use a 5k pot in series with 1k resistor to make a delay control.

the chorus works! thanks to all
thank ppaappoo I made other PCB for probe this and other modes; my 5 pot mode!!!!!!!!!!!!

ppaappoo

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #575 on: March 21, 2011, 07:33:49 AM »
today I will inject a triangular signal on pin 2 of pt2399, but I have a doubt about the voltage range supported by the ic.

LaceSensor

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #576 on: March 22, 2011, 12:35:28 AM »
Hi, i make the chorus but don't works, only sound the clean guitar.
And this are my values compared to the frecuency central ones.

Power supply 8.93V
Tester range 20VDC

TL072

1: 1.4 to 7.3
2: 2.7 to 3.3
3: 2.6 to 3.3
4: 0v
5: 4.79
6. 4.95
7: 4.95
8: 8.93


PT2399

1: 4.95
2: 2.2 to 2.5
3: 0
4: 0
5: 4.94
6: 0.55
7: 0
8: 4.55
9: 4.78
10: 0.33
11 through to 16:  2.4 (slight movement)

Frecuency central

NE5532

1:  0.13 to 4.9
2:  2.9 to 3.2
3:  2.7 to 3.1
4:  0v
5:  4.79
6.  4.9
7:  5.14
8:  9


PT2399

1:  5
2:  2.38 to 2.42
3:  0
4:  0
5:  2.75
6:  0.61
7:  0.88
8:  0.88
9 through to 16:  2.41 (slight movement)



I had a similar problem with my last build. Here's what it boiled down to for me -
1. make sure the 100R is 1k - it has to do with the PT2399 locking up
2. check the 330K behind the voltage regulator - mine drifted in value
3. check the 1meg from pin 7 on the opamp

In bypass. everything was fine, but no signal at all with the effect on. I found that when I touched the back of the PCB in the output path, I got hum .
I also a - touched up my solder connections
        b - checked every solder joint and trace for continuity and solder bridges
The end result was #3 above
#2 above took care of my voltage readings

Hope this helps. I was very pleased with the build once it was working.
Hi thanks for your input
Can you clarify what you mean by checking the 1M and the 330K? Do you simply mean checking their resistance is accurate?
I did indeed use a 1k rather than the 100R resistor mentioned.

bluesman1218

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #577 on: March 22, 2011, 02:01:45 AM »

I had a similar problem with my last build. Here's what it boiled down to for me -
1. make sure the 100R is 1k - it has to do with the PT2399 locking up
2. check the 330K behind the voltage regulator - mine drifted in value
3. check the 1meg from pin 7 on the opamp

In bypass. everything was fine, but no signal at all with the effect on. I found that when I touched the back of the PCB in the output path, I got hum .
I also a - touched up my solder connections
        b - checked every solder joint and trace for continuity and solder bridges
The end result was #3 above
#2 above took care of my voltage readings

Hope this helps. I was very pleased with the build once it was working.
[/quote]
Hi thanks for your input
Can you clarify what you mean by checking the 1M and the 330K? Do you simply mean checking their resistance is accurate?
I did indeed use a 1k rather than the 100R resistor mentioned.
[/quote]

Yes, that's what I meant.
It's all about the tone!
Steve

POPA - Plain Old Power Attenuator AVAILABLE for PURCHASE soon!
Silvertone 1482 rebuilt - switchable Tweed, tube reverb, Baxandall + / Little Angel Chorus build, tons of Modded pedals

ppaappoo

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #578 on: March 22, 2011, 12:41:42 PM »
it's possible a softless lfo? like a sine wave or just modify the current lfo to make it more soft on the peaks?

thanks

ppaappoo

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #579 on: April 05, 2011, 11:35:05 AM »
hello, how I can do to increase the volume of the signal delay? o maybe add a mix control.