Author Topic: "Little Angel" - Super Simple PT2399 Mini Chorus  (Read 499452 times)

Earthscum

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #100 on: August 11, 2010, 09:45:47 PM »
Holy wow! Ok, I hear what you're talking about now. That's definitely a mod I'll be using... and refusing to my buddies! I gotta keep my rig sounding the kewlest...  ;D

Hats off to both of ya!
Give a man Fuzz, and he'll jam for a day... teach a man how to make a Fuzz and he'll never jam again!

http://www.facebook.com/Earthscum

$uperpuma

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #101 on: August 12, 2010, 12:51:32 AM »
This is very cool.  Breadboard time!
Breadboards are as invaluable as underwear - and also need changed... -R.G.

~arph

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #102 on: August 12, 2010, 02:11:35 AM »
And give the changes in post #81 a try  8)

frequencycentral

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #103 on: August 12, 2010, 07:11:33 AM »
try this:  remove the 1n cas between 13-14 and 15-16: no audible difference -> saves two components

I could remove the 13/14 cap without trouble, but removing the 15/16 cap caused noise. Haven't played with the other values yet.

Little mod for anyone who's interested try changing the resistor connected to pin 15 to 22k, that makes the wet side a bit louder and sounds more chorusy to me. It might mess with to overall level though.

Yes this certainly works! Although the effect is now higher than unity, but easily tamed back.

~arph

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #104 on: August 12, 2010, 07:57:52 AM »
You can make it more vibey if you apply some of that modulation to pin six too  ;D
The 22k in the input stage mod works really well too..

culturejam

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #105 on: August 12, 2010, 01:05:49 PM »
The 22k in the input stage mod works really well too..

Which resistor are you referring to? By that I mean which part number on the Little Angel schematic are you referring to?

Thanks

slacker

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #106 on: August 12, 2010, 01:18:46 PM »
It's R5 on the layout, the 10k connected to pin 15 of the PT2399.

Brymus

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  • Bryan G. - Somewhere in the Mohave Desert USA
Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #107 on: August 12, 2010, 02:11:40 PM »
This just keeps getting better and better....
Nice build and clips Forrest !!
I'm no EE or even a tech,just a monkey with a soldering iron that can read,and follow instructions. ;D
My now defunct band http://www.facebook.com/TheZedLeppelinExperience

Talison

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #108 on: August 12, 2010, 02:40:54 PM »
how about a Vero layout?    ;D

Brymus

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #109 on: August 12, 2010, 03:52:23 PM »
Hope this isnt a dumb question  :-[
But what about adding the Taptation controller that TTG just released ?
Would that allow the phasing/modulation to be "controlled" a bit more ?

EDIT posts =  1111  ;D
« Last Edit: August 12, 2010, 03:58:57 PM by Brymus »
I'm no EE or even a tech,just a monkey with a soldering iron that can read,and follow instructions. ;D
My now defunct band http://www.facebook.com/TheZedLeppelinExperience

culturejam

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #110 on: August 12, 2010, 04:27:11 PM »
It's R5 on the layout, the 10k connected to pin 15 of the PT2399.

Thanks!

Renegadrian

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #111 on: August 12, 2010, 06:00:20 PM »
how about a Vero layout?    ;D

I was working on it, but Rick adviced it's better to have a definitive version and not a work in progress.
As soon as we can say "that's the final version" I am gonna finish my vero layout.
Done an' workin'=Too many to mention - Tube addict!

frequencycentral

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #112 on: August 12, 2010, 06:06:31 PM »
how about a Vero layout?    ;D

I was working on it, but Rick adviced it's better to have a definitive version and not a work in progress.
As soon as we can say "that's the final version" I am gonna finish my vero layout.

I think what we've got now is close enough already. After all, a verified PCB layout now exists, so why not a vero?

So that's the LITE version wrapped up, give or take a few values here and there. So what features do we want in the ELITE version?

culturejam

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #113 on: August 12, 2010, 07:18:40 PM »
So that's the LITE version wrapped up, give or take a few values here and there. So what features do we want in the ELITE version?

Adjustable max delay time.  ;D

zambo

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #114 on: August 12, 2010, 07:55:08 PM »
Thanks for this cool project Rick.
P.S. I also believe that you are an alien
I wonder what happens if I .......

Renegadrian

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #115 on: August 12, 2010, 09:30:54 PM »
how about a Vero layout?    ;D

I was working on it, but Rick adviced it's better to have a definitive version and not a work in progress.
As soon as we can say "that's the final version" I am gonna finish my vero layout.

I think what we've got now is close enough already. After all, a verified PCB layout now exists, so why not a vero?

All right, I'll post it in some days then!!!
Done an' workin'=Too many to mention - Tube addict!

culturejam

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #116 on: August 12, 2010, 09:45:49 PM »
Another idea for the ELITE version:

How about a toggle switch to apply the LFO wobble to pin 6 as well as pin 2?

And what about having a trimmer + resistor in place of the 100K resistor to ground on the output? Could be like a "level" control of sorts to help match unity volume.  Unless you already have output volume control via op amp in the works for the Elite.

Brymus

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #117 on: August 12, 2010, 09:50:15 PM »
Why not a set of filters to pass the mids and/or bass through un-modulated with a blend control ?
I'm no EE or even a tech,just a monkey with a soldering iron that can read,and follow instructions. ;D
My now defunct band http://www.facebook.com/TheZedLeppelinExperience

Earthscum

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #118 on: August 13, 2010, 12:59:07 AM »
How about a toggle switch to apply the LFO wobble to pin 6 as well as pin 2?

And what about having a trimmer + resistor in place of the 100K resistor to ground on the output? Could be like a "level" control of sorts to help match unity volume.  Unless you already have output volume control via op amp in the works for the Elite.

I tried it. Didn't really do much. Gotta build a second LFO for it to modulate at different speeds, then you would notice a difference.

Also, I just used a 100k volume pot and started it out on high, like 100k to ground. I ended up having to turn it down a hair (to probably about 75k) to hit unity. I'm also using a bass to test this (since that's what I'm building it for), and noticed the B and E strings don't get as much of the effect as A and higher.

I noticed, though, that my 500k pot only had about 1/8 turn as usable range... after I dropped the 33k. With the 33k in place, I was getting no wobbling. I triple checked everything, so not sure why it does this. Also, my 100k has only about 1/4 usable area. I'm done with it for the night, but if anyone has any suggestions, I'll try them out tomorrow.

Edit to add: I'm using TL072. Could this be part of it? All I have on hand at the moment is TL072's & 4's, 741's, TL082's, and LM324's.
« Last Edit: August 13, 2010, 01:04:14 AM by Earthscum »
Give a man Fuzz, and he'll jam for a day... teach a man how to make a Fuzz and he'll never jam again!

http://www.facebook.com/Earthscum

frequencycentral

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #119 on: August 13, 2010, 04:12:15 AM »
I have given my permission for guitarpcb.com to do a run of PCBs:

http://www.guitarpcb.com/apps/webstore/products/show/1690146

« Last Edit: August 13, 2010, 04:24:42 AM by frequencycentral »