Magnus Modulus

[Clyde]

First of all I would like to say Hello to all.
I completed my first build(MM). But I am having trouble with static on the entire box. I had trouble at first with pots,replaced 4:2-50k,and 2-500k because nothing worked. Well it works now but a lot of static. Can someone help please? Don't really know where to start,as I am a beginner.

                                                                                                                        Thanks,
                                                                                                                             Ray

[danielzink]

Have you tried this:

http://www.diystompboxes.com/smfforum/index.php?topic=29816.0

[Clyde]

I have taken values of components:
 Q1 (J201)              Q2 (Lm78L05)          IC1 (pt2399)
  G: 4.2mv             input  9.20V                pin1: 5.02V            pin9: 2.51V
  S: 1.9mv              grnd  1.7mv               pin2: 2.48V           pin10: 2.48V
  D: .629V            output 5.02V                pin3: 2.4mv           pin11: 2.48V
                                                             pin4: 2.3mv           pin12: 2.15V
                                                             pin5: 2.98V           pin13: 2.48V
D1 (1N4004)                                           pin6: 2.26V           pin14: 2.45V
1.7mv                                                    pin7: 2.31V           pin15: 2.51V
D4 (1N4148)                                           pin8: 2.42V           pin16: 2.48V
1.9mv
D5 (1N4148)

IC2 (NE5532)                                          IC3 (NE5532)
pin1: 3.98V         pin5: 3.98V                   pin1: fluc              pin5: fluc
pin2: 3.84V         pin6: 3.98V                   pin2: fluc              pin6: fluc
pin3: 3.82V         pin7: 3.99V                   pin3: fluc              pin7: fluc
pin4:1.8mv         pin8: 9.20V                   pin4: 1.9mv          pin8: 9.20V
  The only mods I made were to enlarge the PCB to accomadate larger cap sizes as I did not have the small elec.caps. and to add a jumper for another LED.      Again Thanks,Ray

image link:     http://imgur.com/K1Jpp3Z

[duck_arse]

for schem posting, have a look at this thread:
http://www.diystompboxes.com/smfforum/index.php?topic=108594.0

[Clyde]

  Thank you very much Mr. Duck

[blackieNYC]

describe the static further. Constant noise, or just when pots are moved around?  What if your delay level is all the way down, or the thing is bypassed as shown (two op amp stages are always in the circuit, not true bypass - for "tails", as you probably know)? Turn both modulation and tremolo off.  Or try a battery briefly (this thing will probably eat it up, but it's just a test).  Maybe disable the LFO, or the PT2399?

[duck_arse]

just out of curiosity, your circuit diagram shows pin3 of IC1a connected to the 4V5 point at R8//R11//C16. your posted IC numbering doesn't quite match the schem, and neither of your pin 3's are at 4V5. can you measure the voltage at that point, maybe rmeasure/repost so the volts match the numberings?

the 4V5 should also show at the gate of the j201 ........