Soo...I messed up the Phase 90 mods real good

[iaresee]

Man, I should know better than to try to do a lot of part swaps when I'm tired. Ahh well...I get a hot iron in my hands I lose all self control!

So, I followed some of this picture's recommendations. And also changed out R7 for a 10k. No sound now when the pedal is engaged. Opps! 

In total:

Removed R28 (had done this last year), R32, C11 and C12
Removed R31 and replaced with a jumper cable
Replaced C4 and C2 for 0.047 uF caps (I had two of these labeled 47 -- I'm pretty sure that's 47 pF -- kicking around, so I used them)

Hmm...I didn't change out the 150k resistor at R20 for a 1M. Looking at the schematic it doesn't look like a critical fix. To be honest with you some of the mods are a little strange. I guess it is for complete Script authenticity? For example R32 looks like it could stick around if you take C11 out -- it'll just be dangling, no path to ground. I did take both out though.

All the solder joints check out. There's continuity where I expect it. Any tips for debugging this? I did try the pedal on a 9V and on a wall wart just to be sure it wasn't a dying battery.

Any tips are most appreciated! Thanks!

- Ian

[aab0mb]

Put R7 back to stock value. 

[iaresee]

Put R7 back to stock value. 

Thanks! I put it back to 150K and that got me something out of it. But it's still quite faint. Am I underestimating the effect of changing R20 from 750K to 1M? I'll have to try that tomorrow. Need. Sleep.

[zombiwoof]

47pf is .000047 µf, not .047.  You think that might be the problem?

Al

[iaresee]

47pf is .000047 µf, not .047.  You think that might be the problem?

Without a doubt! Man, in the cold hard sunlight of day that looks like a big mess a made.