Topics

Hi,

Probably a silly noob question, but I was wondering if it would be possible to have the Grapevine Rock/Rawk modes on a pot (dual gang) instead of a switch.  Would it even work for sweeping between the Rock/Rawk modes? 

Any thoughts, comments, suggestions?

Thanks

Hi,

So I recently made some mods to a LaVache pedal, really I just put the gain pot on a foot switch so I could toggle between a cleaned up sound and full dirt.  The other thing I did was add two extra LED status indicators for the gain foot switch and for the boost foot switch.  For the two new LEDs I just ran two additional leads from the power rail to 4.7k resistors connected to each LED.  So in total, the pedal has 3 LEDs.  

Now I noticed that I'm getting a "ssss" sound when the pedal is engaged.  I probed around and I think I pinned down the root cause to power supply noise.  I get the same "ssss" where R3 (3k3) connects to the transistor as I do if the audio probe is connected directly to the power rail.  I checked the connections and the resistance of R3 and everything checks out normal.  

So I'm wondering if the addition of the two extra LEDs messed with the power filtering?  And if so, would changing the value of C4 or C5 fix it?

Thanks