Author Topic: "Little Angel" - Super Simple PT2399 Mini Chorus  (Read 497849 times)

cgibsong002

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #620 on: May 10, 2011, 06:45:19 PM »
Yeah. I just unsoldered both IC's and the tranny so I could put in sockets. I tested multiples for all three components, with nothing changing. I also put in the 1K resistor, as well as tried it with my power supply, a battery with 8V on it and a battery with 9.25 on it. Nothing.

So yeah, I'm getting static voltages on pins 1-3. Now that I know this is an issue, where do I look to fix it? I can't find any issues on my board unless there's some damn micro traces. Which reminds me... I'm never using vero again. Looks good on paper. Sucks dick building it  :icon_evil:

frequencycentral

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #621 on: May 10, 2011, 06:57:29 PM »
If you are using Sabro's vero, it's pins 5, 6 and 7 you need to get moving, not 1, 2 and 3. Check for shorts. Triple check all track cuts for micro bridges. Quadruple check all values. Make sure the IC is actually the right way around. Check off board wiring to speed pot. Etc

frequencycentral

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #622 on: May 10, 2011, 06:59:16 PM »
I'm never using vero again. Looks good on paper. Sucks dick building it  :icon_evil:

Yeah, I hate the stuff. I don't understand people's attraction to it.

bluesman1218

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #623 on: May 10, 2011, 07:45:40 PM »
I'm never using vero again. Looks good on paper. Sucks dick building it  :icon_evil:

Did my 1st build on vero and couldn't get it to work. Must've been micro solder bridge? Some folks love it, not me... yet.

Govmnt_Lacky "I don't remember a 3904 being in Rick's circuit"
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cgibsong002

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #624 on: May 10, 2011, 07:54:44 PM »
If you are using Sabro's vero, it's pins 5, 6 and 7 you need to get moving, not 1, 2 and 3. Check for shorts. Triple check all track cuts for micro bridges. Quadruple check all values. Make sure the IC is actually the right way around. Check off board wiring to speed pot. Etc


wait.. i'm not quite sure I understand. My values kind of match up with yours as far as pin 1-pin 1, pin 2- pin 2, etc. go. am i supposed to get similar values to you, except 5,6,7 will oscillate? Or should all my pin values be opposite of yours.. i.e. on the other side of the op-amp. and my 5532 is definitely in the right orientation. started popping as soon as i plugged it in with it flipped.

ok my pots. looking at them from the bottom, it goes 3, 2, 1 left to right, correct? then I shorted 1 and 2 together on each pot

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #625 on: May 10, 2011, 08:01:55 PM »
My PCB layout uses pins 1,2 and 3 for the LFO, Sabro's vero uses pins 5, 6 and 7 for the LFO. Look carefully at the orientation on each layout. If you've had your NE5532 in the wrong way around at any point it will be dead now.

Your pots should be fine.

cgibsong002

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #626 on: May 10, 2011, 08:24:56 PM »
My PCB layout uses pins 1,2 and 3 for the LFO, Sabro's vero uses pins 5, 6 and 7 for the LFO. Look carefully at the orientation on each layout. If you've had your NE5532 in the wrong way around at any point it will be dead now.

Your pots should be fine.

it appears to still be fine, but i've got plenty so no worries.

i'm baffled right now about the jump across R10. My meter is telling me I have continuity across there... but the gap across my cut is huge. I haven't used the continuity function much, but is there something i'm missing here? is this my problem or is there something i'm not seeing in the circuit where there should be continuity there?

cgibsong002

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #627 on: May 10, 2011, 08:53:37 PM »
Uhh... I just noticed. On the vero layout there's an R22 parallel to the 1n4148. However it is not listed in the parts list. May have just found the culprit?

EDIT: Ok.. so after reading through every single page, I think I found my answer on like the last page. Is R22 supposed to be the 68K resistor?

EDIT EDIT EDIT:  >:( >:( ??? Still no good. It has to do with this continuity I have across the 1M resistor... because if that was shorted then it would pretty much just go from input through a 100K resistor back to output (I think?). But I don't see how, I've completely mutilated that cut and it's still reading 0 on my continuity meter.
« Last Edit: May 10, 2011, 10:47:22 PM by cgibsong002 »

cgibsong002

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #628 on: May 11, 2011, 03:29:15 PM »
nope.. i'm an idiot. i finally looked over the schematic and realized the 1M ohm resistor was grounded from input. so when my effect is switched off the input is also grounded which is why i was getting continuity across that gap.

so now i'm still stuck. could this possibly have to do with lock-up, or not likely since i never get any chorus effect?

Govmnt_Lacky

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #629 on: May 11, 2011, 03:32:50 PM »
so now i'm still stuck. could this possibly have to do with lock-up, or not likely since i never get any chorus effect?

Just keep in mind that this is NOT a CE-2 or a Small Clone  ;)

The chorus effect is VERY subtle.

Good Luck  ;D
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frequencycentral

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #630 on: May 11, 2011, 03:46:03 PM »
The chorus effect is VERY subtle.

Is it? I never thought so. Have a listen to my soundclips.

Govmnt_Lacky

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #631 on: May 11, 2011, 03:57:33 PM »
The chorus effect is VERY subtle.

Is it? I never thought so. Have a listen to my soundclips.

I listened to A LOT of sound clips however, I could never get my Angel to sound like some of them. I have consulted quite a few people about this and most of them agreed. I even went as far to ship my build to another continent and have someone else give it a go (Thanks again Chris  ;D) He told me that it sounded just like his.

To me it just sounds subtle. Compared to a CE-2 or a Small Stone that is.

Can you link a particular sound clip that is a good example?

Don't get me wrong... it still has its place in my pedal chain!  ;)
« Last Edit: May 11, 2011, 04:00:00 PM by Govmnt_Lacky »
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cgibsong002

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #633 on: May 11, 2011, 04:28:05 PM »
oh believe me... I'd know if it was working right, lol. There wouldn't be 30 pages if it sounded like a clean input.

and ok... i've literally double and triple checked the whole pedal. i ran along every single trace with a blade to make sure there were no bridges. i double checked every value and positioning of every component. I have no clue what else I can do. Has anyone verified this layout?? If so, how would I know if I maybe have a bad cap or something? Can't see what else it would be aside from those two options.

Renegadrian

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #634 on: May 11, 2011, 07:04:01 PM »
I'm never using vero again. Looks good on paper. Sucks dick building it  :icon_evil:

Yeah, I hate the stuff. I don't understand people's attraction to it.

 :icon_eek:
Done an' workin'=Too many to mention - Tube addict!

cgibsong002

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #635 on: May 11, 2011, 07:28:37 PM »
Hallelujah! It turns out my 100K pot was bad. Replaced it and we're all good now! My report was technically due yesterday, but whatever. Sounds good! I'm going to try dropping the 1K down to the 47R now.

deadastronaut

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #636 on: June 05, 2011, 08:06:38 PM »
hi rick!..

which layout is the best for this, page 4?..........i love it..i was looking for an alex lifeson type chorus and this sounds like its it!...(think red barchetta)

is this cool with an overdriven type sound too?..

i have a spare 2399 laying around and right fancy this!!!!!....nice!.

« Last Edit: June 05, 2011, 08:17:01 PM by deadastronaut »
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frequencycentral

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #637 on: June 06, 2011, 08:45:31 PM »
hi rick!..

which layout is the best for this, page 4?..........i love it..i was looking for an alex lifeson type chorus and this sounds like its it!...(think red barchetta)

is this cool with an overdriven type sound too?..

i have a spare 2399 laying around and right fancy this!!!!!....nice!.



Yup, page 4. Or the 1590A layout on page 9.

Although I'll be doing a new layout for LA's 1st birthday, incorporating some improvements like the pin 6 fix and seperate vref.
« Last Edit: June 06, 2011, 08:54:46 PM by frequencycentral »

iccaros

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #638 on: June 06, 2011, 11:44:17 PM »
Cool I have 4 PT2399 on order, now I need a crap load of  low profile and love voltage caps, for some reason my 450volt caps don't fit well in a pedal...


deadastronaut

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #639 on: June 07, 2011, 07:03:31 AM »
cool....so when is little angels birthday?...is it on the 28th..like mine!.it'll make a good prezzie... :icon_wink:

(did you get that printer btw?)..mines great!..

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chasm reverb/tremshifter/faze filter/abductor II delay/timestream reverb/dreamtime delay/skinwalker hi gain dist/black triangle OD/ nano drums/space patrol fuzz//