"Little Angel" - Super Simple PT2399 Mini Chorus

[frequencycentral]

I built a birthday edition on Sunday, works perfectly.

[askwho69]

Just built in last night WORKS perfect too Thanks so much for this wonderful circuit simple but beautiful

[deadastronaut]

brilliant, cheers guys...thats good to know!....cool stuff rick!.

still can't get my lfo to kick in on bread, but i'll persevere...i must be doing something weird!..

btw can a rate led be attached to the opamp?...or would that mess with the lfo/sound/performance?....you know what i'm like with leds...

edit got it, op amp pin 1 led....

[garcho]

op amp pin 1 led

Nice! I'll be adding that, too.

[deadastronaut]

@garcho: yep!!!...

i finally got it going on bread...cool.  nice one rick...

now to mod and prod it...

i'd like a little more depth, any depth mods?...

[thedefog]

Last night I lifted resistor R20 where R20 and C14 meet to make Vibrato sounds. Muddy fun! I'm guessing the angel is already maximized for optimal fidelity and minimal aliasing. Has anyone tried shifting the LPF cut-off with decent results?

[deadastronaut]

^ got ya, just tried that....cool.   lots of fun.  

edit: just made a clip with full depth, but changing the 33k from pin 2 of the pt....  33k/22k/10k/8.2...

http://dl.dropbox.com/u/7464107/33k22k10k8.2kchorus%20test.mp3


edit 2:

ok, been messing around again... i took that 10k vibrato mod, and swapped it out for a 33k... i also swapped the 33k from pt2399 pin 2 to a 22k...this gives a nice warble and isn't as drastic a tone change from bypass/on...
ive always noticed chorus's tend to be too bright imo...compared to bypass........anyway heres a clip...

http://dl.dropbox.com/u/7464107/chorustest2.mp3

[askwho69]

i compare my LA in youtube my sounded too subtle? why is that? like yours rob its very subtle  not like FC's demo at 1st page

[bluebunny]

Finally boxed mine up that I built and tested weeks ago (birthday edition).



Still sounds sweet.   

[rhcp_schipper]

Hello Guys,

I have a little problem with the little angel chorus I bought from Chris(Elmusicoloco). The thing is that when I use the chorus in the fx loop of my new bought Ibanez TSA15H amp, the chorus seems to give a noticeable volume boost. I think the volume boost is there when not in the fx loop, but it is much less noticeable. Is there anyone else that has noticed this problem?

And the most important question (for me), is there a way to fix it? Asked chris, but he is to busy with business right now, and I don't have the patience.

Hope someone can help me out here.

Thanks,

Tim

[rhcp_schipper]

Anyone? 

[garcho]

Did you take a gander at the trouble shooting guide?

[rhcp_schipper]

Did you take a gander at the trouble shooting guide?

No, I don't. But the pedal works allright, the only problem that occurs is the volume boost when used in the fx loop.

[frequencycentral]

Anyone? 

Without hacking into the PCB, voltage divider on the output. Maybe use a 100k trimmer and set it just how you like it.

[rhcp_schipper]

Anyone? 

Without hacking into the PCB, voltage divider on the output. Maybe use a 100k trimmer and set it just how you like it.

Can you please be more specific. As I said I bought the pedal from chris, I didn't build it.
Would be great is I can fix this problem.

[Govmnt_Lacky]

Anyone? 

Without hacking into the PCB, voltage divider on the output. Maybe use a 100k trimmer and set it just how you like it.

Can you please be more specific. As I said I bought the pedal from chris, I didn't build it.
Would be great is I can fix this problem.

Set up a 100K trimmer pot in a voltage divider format to set the output to unity.

Take a 100K trimmer and connect the PCB audio output to one lug. Attach the other lug to ground. And attach the wiper to the pedal output.

Adjust to taste. Set it and forget it! 

Look at how the MXR Dist+ Volume is wired here and just substitute the pot for a trimmer:

http://www.generalguitargadgets.com/pdf/ggg_dist_plus_lo.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a

[rhcp_schipper]

Thanks! Going to try this soon. Really hope this solves the problem.
Thanks again.

[ggsmailroom]

OK Guys, I am having a serious issue.

I built up the Perf layout (Revised for Chip hangup), and I cant find my Delay Pot Resistor anymore

I had it ok with the one I built before that had no revision for IC hangup, but I went back and redid it and now it works great but I cant get my delay knob back.

Any idea what I should do?

Its this layout - http://www.sabrotone.com/wp-content/uploads/2011/04/LittleAngelRev1.gif

Someone help!!!

[deadastronaut]

i think its a case of either/ or...

with the pin6 fix...you now lose your delay pot...which was on pin 6.....

if you try switching between the pin6bfix and a delay pot.... it makes some strange noises...and of course locks  up again...sometimes..

just the way it is i'm afraid...ive tried it....on breadboard.....

unless there is a cure for that which someone more knowledgable knows...

[ggsmailroom]

I get a kindof slap delay when I remove r8 from the circuit completely, when i add a pot here I get a semi evident delay pot, but it doesnt seem to change with even a B1m attached, you just get the same subtle like 5ms delay.

Need to get the Mix knob fixed I guess, this sucks!! I had really wanted the delay