ROG UBEsreamer question

Started by svstee, April 03, 2009, 03:06:06 PM

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svstee

After great success with the red llama, I decided to build something else with the CD4049UBE,  ROG's UBEscreamer. I found a great looking verified layout (I still don't trust myself to design a layout with CMOS stuff) but I have a few questions.
Layout: http://aronnelson.com/gallery/main.php/v/calpolyengineer_001/Layouts/UBE_Screamer/ROG+-+UBE+Screamer+-+Vero+Layout+_smaller_.gif.html?g2_imageViewsIndex=1
Schematic: http://runoffgroove.com/ubescreamer.html
1: On the layout I see a blend pot that I don't see on the schematic. It works by mixing the upper distortion path and the lower clean path, right?
2: What is the value of the blend pot? I'm thinking 100k Linear, since according to the schem there shout be a 100k resistor after what is C9 on the layout.

Thanks!

svstee


cheezit

As I read it, the layout's blend control is taking the place of the two 100k mixing resistors before U1E.  Reverse the schemo and see!  If that's true, then a linear 250K should do. 

svstee

Yep, you're right! didn't see the other one. Thanks!