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Okay, I just did the Univibe mod. It replaces C3, C4, C5, C6 with different values. I used a 4PDT switch to toggle between stock Phase 90 and Univibe. Both settings sounds great!

Nice build!

Okay, I have to ask. What 1/4" jacks are those? I keep seeing them on this forum.

Thanks!

I got the mods working but I dont really like them. I'm just gonna stick to a complete stock phase 90.

Thanks for your input! Just saw these replies now.

I dug Pickdroppers 1590a Phase 90 out of the "drawer of fail" to see if I could finally get it to work properly and I'm happy to report that it was a success! Not sure what I did but I suspect it was a bad part somewhere. I Changed a few components out for new ones and replaced the switch and pot. It came to life after that. Sounds beautiful now.

I've got two questions about some mods.

I'd like to add:

1. A mix pot to go from 100% Dry to 100% Wet (vibrato).
2. A depth pot to control the amount of pitch bend.

Anyone know how to do it on this board?

I'm quite interested in making the switch over to relay in my builds. Finish Line looks great.

However, I'm concerned about having a popping sounds when engaged. I've only had one pedal in the past (before I built my own!) that had a relay and it had a VERY loud pop. It was useless to me because of that. Can you guys chime in a bit and let me know if you notice any popping and if so, how loud it is?

Also, when engaging the relay on/off does the sound cut out at all? I'd need a continuous sound as I turn pedals on and off.

Thanks for your input!

Looks fantastic! Would love to hear a demo!

Well, sadly no improvements. Messed with the zener, replaced Q1, and replaced R2. Sounds the same. 

Thanks SO MUCH for this! I have not had ANY time to work on the circuit for the past few days. Hoping I'll get some time this weekend. If not, I'll certainly get to it on Monday. I'll report back!

I'll try replacing R2. If that does not work, I'll replace Q1.

Yup, pickdropper sent me the matched transistors with his PCB.

Thanks guys!

The sounds is bad in both modes, but the noise sounds a bit different in each mode.
I already tried the 4.7v zener. No help.
I'll try replacing Q1. Would a 2n3906 work okay as an alternative?
If that does not work, I'll try the voltage divider.

Do my voltages look okay? Anything look bad?

Oh, and here is Pickdropper's link to all of the circuit info:

https://www.dropbox.com/sh/h9ubrun6w0qzeu5/AABIRGeuj16hDIV7dRuwNDpJa/Phase%2090%20v4.7%20(SMT%20FETs)%20Release%20Documents?dl=0#/

Okay, I decided to pick this back up from the "Box of Fail" and see if I can get it up and running. Basically, its kind of phasing a bit, but its very weak, not smooth at all, and its very distorted, and very noisy no matter where i set the trim pot.

I'd love if anyone could help me out and get this thing working. I've replaced all the ICs a few times over and there is no improvement. Also quadruple checked all resistor and cap values, and reflowed all solder many times over. 

Voltages (trimpot somewhere around middle):

TL061:

1 0v
2 4.5v - 5.5v
3 3.5v - 6.5v
4 0v
5 0v
6 0.5v - 8.5v
7 9.16v
8 0v



TL071:

1 0.15v
2 5.04v
3 3.37v
4 0v
5 0.15v
6 5.04v
7 9.16v
8 0v



TL074:

1 5.04v
2 5.04v
3 4.96 - 5.03v
4 9.16
5 4.96 - 5.03v
6 5.04v
7 5.04v
8 5.04v
9 5.04v
10 4.96 - 5.03v
11 0v
12 4.96 - 5.03v
13 5.04v
14 5.04v



Q1:

C 3.2v
B 4.45v
E 5.04v



Q2-Q5:

D 4.96v - 5.03
G 1.73v - 1.88v
S 5.04

Looks great! I tried to make one of these but could not get mine to work. I finally gave up. I should take a look again, but I don't really know what could be wrong. I don't see any mistakes and the build went together very easily.

Yeah, I just found the comparative documents of the different chips. Either way, I gotta order some more components, so I'll just throw a few LT1054s into the order. Thanks though!