"Little Angel" - Super Simple PT2399 Mini Chorus

[cgibsong002]

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 

[frequencycentral]

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]

I'm never using vero again. Looks good on paper. Sucks dick building it  

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

[bluesman1218]

I'm never using vero again. Looks good on paper. Sucks dick building it 

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"
That was from the fix added on this page

[cgibsong002]

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

[frequencycentral]

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]

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]

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.

[cgibsong002]

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]

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 

[frequencycentral]

The chorus effect is VERY subtle.

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

[Govmnt_Lacky]

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  ) 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!  

[frequencycentral]

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

http://www.diystompboxes.com/smfforum/index.php?topic=86297.msg722615#msg722615

[cgibsong002]

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]

I'm never using vero again. Looks good on paper. Sucks dick building it  

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

[cgibsong002]

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]

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!.

[frequencycentral]

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.

[iccaros]

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]

cool....so when is little angels birthday?...is it on the 28th..like mine!.it'll make a good prezzie...

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