Hi. I fixed the pics. They might looked cropped off, but if you right click and open them in a new tab (or just download them to your computer) then you will see the full view.

best – D

Hi Ron.

I am mostly curious about the 741s and the surrounding circuitry.

I believe the other two big ICs are just LM324s, which I believe are the A and B ICs in the original circuit, as seen here:

htp://www.freeinfosociety.com/electronics/schemview.php?id=380

I’m guessing EH just scratched them off to protect their circuit from being copied?

But there are no 741 op amps on the original, not from what I have seen from Googling at least.

Some members of one of the popular online stompbox forums made a clone of the mummy board. It looked similar to mine, but omitted the section with the 741s.

Mine also has a different configuration of trim pots (I have one – others seem to have three or so).

best – D

Thanks Ron – that would be great! Let me know if you need a link to the forum with the cloned schematic for comparison. I’m not sure I can post that here.

If you do open one and find that it is the same, could you please take a picture of the wiring. I’m not 100 percent sure that mine is correct, and it’s hard for me to figure out without a schematic.

best – D

Lo and behold… this thing suddenly works. Cleaning up the boards, I found one loose capacitor. The ground connection was also a bit flakey.

I have to say, the vibrato setting on this (via the color switch, oddly enough) yields a really pleasantly, messed up sound. I didn’t look at the wave, but it can’t just be a sine – seems much more complex – almost random. Gives everything you play has a real sea sick quality. Nothing like any other vibrato I have heard.

The only issue is that I am getting some clock noise bleed. On the slow settings, it’s just a quiet occasional tick in the background, but when I put it on the fast settings, the clicks are close together and create a constant buzz when I am not playing.

Assuming that the original V1 schematic is at least partially relevant – can anyone suggest which components might have gone south?

Thanks – D

Hey Scruffle,

Thanks for your input. It seems plausible that this is something between the standard mummy face and the mummy face enclosure with 4049. I will dismantle it again and try to get some better shots for both sides, especially near that extra circuit.

Any thoughts on the noise I’m getting at fast rates? There is one trim pot, and I can change the frequency of the noise by adjusting it (the buzz has more low frequencies in it than I previously indicated – so perhaps it is a hum and buzz), but doing so also cuts out a lot of the effect.

best – D