No info about availability.
Digital Noise Generator
-Noise clock speed can be set with potmeter or with external CV
-Output 10Vpp
-Only 6HP wide (30mm)
-Only 20mm deep
-less than 25mA @12 and -12volt
http://www.engineersatwork.nl/dtronics/pages/modular_noise.html
2 Users are observing this