NOISE SOURCE

The NOISE / RANDOM generates both white and pink noise waveforms. The S/H source provides the necessary input for a sample and hold function to produce equi-probable random voltages. Additionally, the NOISE / RANDOM functions as a random voltage generator which can be activated by pulses or from the pushbutton on the front panel.    Noise/Random BOM Noise/Random Panel LED Assembly   The CA3130 is not included in the BOM. This part can be purchased HERE Please note that the 100n capacitor marked on the PCB should be a MKT or similar   CALIBRATION NOTE - This module requires some patients and quality tools to calibrate correctly.  I found this module works best when 2 PN4250's (they should be installed backwards into the BC557 footprints) are used in place of the top two BC557's. Although 2 BC557's can be used as well. Order 10-15 of the chosen transistor so that the noise section can be properly calibrated. It is best to push the transistor into the footprint without soldering the parts