Deluxe Memory Man original buffere bypass help

[guitylerham]

Hey guys,

Got my DMM clone working and had it wired for true bypass however I think I want to keep it the original buffered bypass so that I don't run into volume differences between bypass and effect.

Question: I am using a layout that looks like this, however I cannot for the life of me figure out what lugs of this diagram switch are which lugs of a 3dpt that I happen to have.


This particular bypass design is eluding me! Using the schematic and the layout, can anyone assign the 3pdt lug letters to the correct numbers please?

[slacker]

4 goes to A, 5 to G, 6 to D. You then need to cut the trace between 4 and the bottom of R29, and then 7 goes the output jack tip.

[guitylerham]

Thanks for chiming in. How come I have to cut the trace between 4 and the R29? Shouldn't I be able to wire up the switch to the original while leaving the PCB alone? Or is there a discrepancy between the schematic and my the PCB layout?

[slacker]

Yeah, the schematic and layout don't match. If you look on the schematic R29 is connected after the switch, and is connected only to points 6 and 7. On the layout, it's connected to the wiper of the Mix/blend pot before where the switch goes, so it's connected to points 6, 7 and 4. Possibly the layout is designed assuming you're building it true bypass and R29 is hardwired in that position.

[guitylerham]

Ok, slacker, I compared the schematic on my own until it made sense to me and I came to your same conclusion. Thank you very much for pointing me in the right direction.

[tomas1808]

Hey, Guitylerham I am interested in building a DMM. Could you please PM me those documents? (layout, etching, schematic, etc)

Is your DMM working 100%?

Or should I just buy a Madbean board?

Many thanks!