It's been a few months. Life happens and what not.
I just finished building the Metasonix TM-7 Scrotum Smasher from the diagrams posted by Eric Barbour on the Metasonix board on Modwiggler.
As with all of the other Metasonix builds I have completed, I posted the diagrams and layouts to my Github. I will also post them on their own page that will be added to the sidebar.
I have also just completed a semi-original design for a Eurorack module, but that is for another post.
After some really frustrating eBay searches for 1/4" phono jacks (you know, instrument jacks) I feel the need to chime in with a simple fact for people:
JACKS and PLUGS are different!
Unlike humans, there are hard definitions when it comes to connector mating pairs and gender.
FEMALE JACKS do not exist - those are called... JACKS.
MALE JACKS also do not exist - those are called... PLUGS.
You PLUG a cord into a JACK.
Good grief!
So I managed to fix the issue I alluded to in my previous post - that issue being an excessive amount of extremely high--frequency noise (nails on chalkboard type) introduced with the controls at certain points. I managed to eliminate the noise by adding a 4.7nF capacitor from pin 7 of the 6LE8 to ground. I also made some miscellaneous changes, the biggest of which is the addition of a four-position rotary switch that will change the frequency at which regeneration occurs.
While I was trying to diagnose the noise issue, I used my capacitor substitution box and I was trying to see how changing the value of C15 in the original schematic affected things. I really liked being able to change the range of the feedback oscillations, so I decided to add the switch. It is entirely optional; you can just pick a cap value and use that, as per the original design.
Here is the updated diagram - as always, click on the image to make it larger, then right-click on the engorged image and click 'Open image in new tab' to see the full size.
Still working on audio/video demos, and trying to figure out how the hell to get this page to work the way I want it to.