Messages

I'll try it right now

I don't see how it would cause the problems I'm having in mine. It should just give twice the total delay time

Let's see, I'll try to stick a 50kA in there. It's kinda weird to hear this is a common problem, since I've seen some demos of the pedal and it sounds pretty good and does the standard delay stuff

I'll try it and post the results here!

do you mean, the kind of diodes? those are 1n914, I think they are what the scheme says, isn't? Or do you had problems with the voltages?

Ok, here are the voltages...

IC 1:
Pin 1: 4.70
Pin 2: 4.30
Pin 3: 4.67
Pin 4: 0.00
Pin 5: 4.68
Pin 6: 0.00
Pin 7: 4.70
Pin 8: 9.44

IC 2:
Pin 1: 5.05
Pin 2: 2.51
Pin 3: 0.00
Pin 4: 0.00
Pin 5: 2.79
Pin 6: 2.43
Pin 7: 0.84
Pin 8: 0.90
Pin 9: 2.51
Pin 10: 2.52
Pin 11: 2.52
Pin 12: 2.51
Pin 13: 2.52
Pin 14: 2.53
Pin 15: 2.52
Pin 16: 2.52
         
IC 3:
Pin 1 : 5.06
Pin 2: 2.51
Pin 3: 0.00
Pin 4: 0.00
Pin 5: 2.73
Pin 6: 2.42
Pin 7: 0.87
Pin 8: 0.93
Pin 9: 2.52
Pin 10: 2.52
Pin 11: 2.52
Pin 12: 2.52
Pin 13: 2.52
Pin 14: 2.52
Pin 15: 2.52
Pin 16: 2.52

IC 4:
Pin 1: 4.71
Pin 2: 4.72
Pin 3: 4.66
Pin 4: 0.00
Pin 5: 4.69
Pin 6: 4.72
Pin 7: 4.72
Pin 8: 4.72
Pin 9: 4.72
Pin 10: 4.63
Pin 11: 9.44
Pin 12: 2.30
Pin 13: 4.72
Pin 14: 4.72

I just checked every resistor in the circuit, and all the codes match. Also looked for solder bridges, but no dice. If any one can give me any direction, where I should be looking at, it would be VERY helpfull, I'm very frustrated right now.

I checked the continuity and it's ok... tomorrow I'll measure the voltages and post here. do you guys have any other ideas?

In the last pic, it looks like you might have damaged the board just above D2, D3 and C47, left of C48. Are the traces in that area still connected?

Paul

I've just checked the board, at first glance it seems to be ok. I'll check the continuity with the Multimeter tomorrow, but I have a strong feeling 'bout the problem being caused by some wrong resistor or capacitor value. But it's just a guess

Well, I just snipped out R45 and no dice, still acting like a reverb and oscilating like crazy with the feedback pot after 1/3 of the turn. Any clue 'bout the area of the circuit I would be paying more atention? I mean, I know it's a verified circuit (like everything madbean sells) and it sounds pretty good, at least on the user's demos. I think I'm just tired from messing with this circuit all day long, maybe I'll take on day or two away from this pedal, but I'm open for ideas 'bout whats causing it to act like this

I don't think the 100k pot could be the cause for the problems, but I completely forgot 'bout r45, I'll try it right away! Thank you!

Oh, I think every pt2399 based delay changes the pitch when you turn the delay knob, the MidFi Electronics Pitch Pirate does this. I'll measure the voltages later and post it here! Thanks in advance

No no, I know it is not working as it should. The delay knob changes the pitch of the sound as I turn it, but I can't get it to repeat notes like my DBD clone, it just oscilates like crazy or gives me a very short slapback. And it happens in every mode, but one of them (wich I don't remenber right now) needs more feedback to oscilate, but doesn't sound like a delay at all. I can hear the ambience and all, it just sounds like a veeeery short delay

Hi there guys,

I had a ZPSDX board lying around for some time and decided to finish it today. I had triple checked everything, resistor values, capacitor positions and values, diodes, etc etc, and this think sounds plain weird. I can't get it to delay like erm, a delay pedal should. It sounds like a reverb, and with the feedback at, I don't know, 1/3 of its turn, it starts self oscilating like crazy. I already checked both PT2399 on my Sea Urchin, and they're both working just fine there. The only substitution I have made is 100kB for the mix pot, since I don't have any spare 50kB. If anyone can point me out a direction, I would love to rock this thing out!

Whoa, talk about tight!

now THAT is tight! Nice one!

hahahahahaha! crap! Actually, this isn't a decal, I printed the artwork on white vinyl adhesive.