Guitar pedals tone sucking!

Hi all,
I have made some guitar pedals and I'm having problems I intergrating them into my guitar setup.
I use mesa boogie dual rectifier with series Efx loop, Korg tuner (has buffer), Vox wah wah, into input, in Efx loop digitech whammy (true bypass) and boss gigadelay, I've gone through this setup and everything sound great.
Where it goes wrong is when I introduce either on the input or in Efx loop Mxr Dyna comp, phase 90, univibe, Mxr flanger.
These are all clones I've built, there is drop in level with any of them in line and also they pretty much disable the vocal quality to the wah wah!
Could anyone shed any light on what's happening and a fix please?
I'm thinking it's impedance but I've run it with the buffer in the tuner one end and the gigadelay the other end and no difference?

You have a volume drop with them online and on, or just in line?

If it's the former, what bypass scheme are you using, and have you confirmed that your wiring is correct? A buffer at the front should cure any impedance issues. A lot of older designs have impedance below 500K, so depending on the length of your guita cable (above 20feet) that could be a concern. 300k is about where a typical 10 footer starts getting below 20khz.

If it's the latter,  some designs just have a volume drop. You can build a very simple adjustable boost or examine the design to see if there's an op amp or transistor stage whose gain you can increase a little.

With them in line and off I.e true bypassed the wah wah doesn't  have vocal like quality?
What I'm interested in is what is the best way to test and fault find what's going on?
I have scope etc.

what is  strange is that this all happens on four pedals which are all completely different? so i must be missing something, they all and individually do something to the audio path?

anything that happens with multiple builds requires something in common. Cable, bypass scheme, etc.

Let me see your bypass wiring and the diagram you used if you want to eliminate that one.

For cable, you need to test with the same total length of the same type of cable. If you're plugging a 15' cable into a pedal and then running a 15' cable to the amp from the pedal and wondering why it sounds different from when you just use one cable -- of course it does, you're putting twice the capacitance in line.

As far as the wah... Well one thing at a time. Let's sort out your bypass first.

Bypass wise they all use 3P2T millienium bypass,
the mxr flanger is the mad beans collosalus:

http://www.madbeanpedals.com/projects/Collosalus/Collosalus2015.pdf


the univibe is the harbinger by mad beans:

http://www.madbeanpedals.com/projects/HarbingerOne/HarbingerOne_2015.pdf

the dyna comp is this link:

https://www.google.co.uk/search?q=diy+dyna+comp&safe=strict&rlz=1C9BKJA_enGB703GB703&hl=en-GB&prmd=svin&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiyuejL07nTAhWSI1AKHbGMBr4Q_AUICygD&biw=1024&bih=653#imgrc=mxmjDxOLWa9zMM:&spf=1

And the phase 90 is this:

https://www.google.co.uk/search?q=phase+90+schematic&safe=strict&rlz=1C9BKJA_enGB703GB703&hl=en-GB&prmd=isvn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi58_GQ1bnTAhXEfFAKHY8fCMUQ_AUICSgB&biw=1024&bih=653#imgrc=3mbePiJQRz1kNM:&spf=156

On the phase 90 I made a correction as part of that layout is wrong and missing a link which I put in.

The dyna comp  I changed to the millennium bypass as that layout didn't have true bypass.


All the leads I'm using are short patch leads, longest is about 3m.

ideally i want to start with just adding one pedal and still retain tone and wah wah working properly, i will of cause in the meantime look at my wiring again on the 3pdt switch as it maybe i have it wrong on all pedals!!! or that could be a viable outcome

everything was wired correctly!!! two rogue patch leads were the culprits!!! sounds fantastic now, no volume drops and wah wah sound like it should!! time to build some more pedals now!!!