I have recently seen indication of several MOTM-190 VCA kits being 'DOA' after building. The problem so far has been mis-reading the 15K resistors and the 75K resistor, and in 1 case mis-reading the 7K5 for the 75K. It is quite difficult in most lighting conditions to decide between 15Ks brown band and the 75K's violet (purple) band. Stooge Larry's Rule of Resistors: measure *every time*. A 2 second DVM check will reveal the correct value. If your MOTM-190 doesn't work, check this first! Paul S.
Message
MOTM-190 resistor swapping
2004-11-13 by Paul Schreiber