EHX Double Tracker

[DLW]

I'm working on an EHX double tracker layout. The Flim Flam doesn't work for me. In looking at the Flim Flam (MN3005) schematic compared to Scruffie's MN3202 based double tracker, there are a few differences outside the BDD differences. First, C9 (flim flam) is connected to pin 6 of the Op Amp, where as the equivalent capacitor (C10) of Scruffie's schematic is NOT connected. Second, the diode near the CD4047 is different in the two schematics. In the flim flam, pin 3 goes through the diode to R18, where as pin 2 goes through the diode to the equivalent resistor (R17) in Scruffie's schematic.

Neither the etched Flim Flam nor a fabricated PCB that I made using the Flim Flam schematic ever worked for me. According to someone on an archived post on DIYStompboxes, Scruffie's schematic and layout worked. I'm wondering if these discrepancies in the schematic could be causing the Flim Flam to fail.




Edit: fix size of images

[madbean]

Can you post a bigger pic of Scruff's? I cannot read it.

[DLW]

Sorry about that... fixed