Modified A-124 Wasp Filter with self-oscillation

(NOTE: could you possibly include specific information on the modification with a link to the discussion of how to do it, or a BOM and schematic, or a link to where it can be purchased with the mod done? Otherwise having a duplicate listing simply showing an additional switch as the end result seems kind of unnecessary.)

This Doepfer A-124 Wasp Filter has been modified with a simple resistor and a Switch with the result of self-oscillation.

• 30 mA +12V
• 30 mA -12V
• ? mA 5V
• 45 mm Depth

No info about availability.